Which ones are the primary and secondary actions in 「Xしながら、Yする」 grammar?


Up to now, I don't understand well how I should translate

> テレビを見ながら、朝ご飯を食べる。

to English.

Some people translate it as

> A: I have breakfast while watching television.

and some other people translate it as

> B: I watch television while having breakfast.

I think there should be two actions here, one is the primary action (or job or
task) and the other one is the secondary action (or job or task).

# Question

Which ones are the primary and secondary actions (or tasks, or jobs) in
「Xしながら、Yする」 grammar?

