What does 'they' refer to and why?

Question

The younger children are taller than the older children. They will go to the store.

Answer 1

A statement that is counter-intuitive followed by one that is an ambiguous non-sequitur.  Unenlightening to say the least.

Answer 2

I would say "they" refers to the younger children, because the younger children are the subject of the first sentence.

If the second sentence said something like "They will all go to the store", then "they" would include the older children, too.  

Answer 3

"They" is referring to both.

Answer 4

I would assume it referred to the younger children, since they were the subject of the first sentence, and therefore the ones you are primarily talking about.

Answer 5

It could refer to either group:

1)  the younger children because they are the subject of the first sentence

2)  the older children because that is the noun that is closest to the pronoun

Ambiguity happens when writing is not clear.  What did you mean to say?  

Answer 6

It's either the younger children or the older children.

Or both.