I do not understand why と is incorrect when trying to say "both"


~~_Before I begin,[this
post](https://japanese.stackexchange.com/questions/11119/why-is-this-sentence-
grammatically-incorrect) is unrelated, despite the similar title._~~

* * *

* * *

Here was the question:

> > _My father and mother both are English teachers._
>
>   1. 父と母は英語の先生です。
>
>   2. 父も母も英語の先生です。
>
>   3. 父も母も英語先生です。
>
>

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I looked at each of the sentences and interpreted that

>   * 父 = ちち = father;
>
>   * 母 = はは = mother;
>
>   * 英語 = えいご = English; and
>
>   * 先生 = せんせい = teacher.
>
>

>

>> Therefore, **Sentence 3** is incorrect because it is missing the particle
の.

Now I also thought that

> も = mo = also.
>

>> Thus, **Sentence 2** is incorrect because there is no "also" in the italic
sentence.

* * *

So I circled **Sentence 1** but I got the answer incorrect. Why so? What was
the correct answer, and what does も mean when it appears twice in one
sentence? Does the meaning change, or remain the same?

ありがとうございます。  
Thank you in advance.




the key is 父 **も** 母 **も**

XもYも is the Japanese way of expressing the idea of "both X and Y"




the key is 父 **も** 母 **も**

XもYも is the Japanese way of expressing the idea of "both X and Y"

