Here's a short story:

The indigenous peoples of the Americas are the descendants of the pre-Columbian inhabitants of the Americas. Pueblos indígenas (indigenous peoples) is a common term in Spanish-speaking countries. Aborigen (aboriginal/native) is used in Argentina, whereas "Amerindian" is used in Quebec, The Guianas, and the English-speaking Caribbean. Indigenous peoples are commonly known in Canada as Aboriginal peoples, which include First Nations, Inuit, and Métis peoples. Indigenous peoples of the United States are commonly known as Native Americans or American Indians, and Alaska Natives. 

According to the prevailing theories of the settlement of the Americas, migrations of humans from Asia (in particular North Asia) to the Americas took place via Beringia, a land bridge which connected the two continents across what is now the Bering Strait. The majority of experts agree that the earliest pre-modern human migration via Beringia took place at least 13,500 years ago, with disputed evidence that people had migrated into the Americas much earlier, up to 40,000 years ago. These early Paleo-Indians spread throughout the Americas, diversifying into many hundreds of culturally distinct nations and tribes. According to the oral histories of many of the indigenous peoples of the Americas, they have been living there since their genesis, described by a wide range of creation myths. (End of story)

Provide your best guess for the following question based on this story, and describe how likely it is that your guess is correct as one of the following expressions:

Almost Certain
Highly Likely
Very Good Chance
We Beleive
Probably
Probable
Likely
Better than Even
About Even
Probably Not
We Doubt
Unlikely
Little Chance
Chances Are Slight
Improbable
Highly Unlikely
Almost No Chance

Give ONLY the guess and your confidence, no other words or explanation. For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>
Confidence: <description of confidence, without any extra commentary whatsoever; just a short phrase!>

Here are a few examples of questions and answers:

Question: Who are the indigenous peoples ancestors?
Guess: pre-Columbian inhabitants of the Americas. Pre-Columbian inhabitants of the Americas.
Confidence: <appropriate level of confidence in this guess>

Question: How are they referred to in Spanish?
Guess: Pueblos indígenas. As Pueblos indigenas.
Confidence: <appropriate level of confidence in this guess>

Question: And in Argentina?
Guess: Aborigen. As aborigen.
Confidence: <appropriate level of confidence in this guess>

Question: What about Canada?
Guess: commonly known in Canada as Aboriginal peoples. In most of Canada as Aboriginal peoples, but in Quebec as Amerindian.
Confidence: <appropriate level of confidence in this guess>

Question: Via which route did people migrate through Asia into Americas?
Guess: via Beringia. Via Beringia.
Confidence: <appropriate level of confidence in this guess>

Question: How long ago?
Guess: 13,500 years ago. At least 13,500 years ago.
Confidence: <appropriate level of confidence in this guess>

Now answer the following question in the same format.

Question: What did the Paleo-Indians then do?

spread throughout the Americas. Spread through the Americas.