Explanation:
Explanation:
The phrase "so many ... that" is used to show the cause or effect of the quantity mentioned. Here, the sentence implies that the number of children was so large that it was impossible to feed them all.

"so many children" sets up the large quantity.

"that she couldn't feed" expresses the consequence of the large number of children.

So, the sentence means the number of children was beyond her capacity to feed.

Why the other options are incorrect:
A. that she couldn't feed them all – While this seems like it could work, it makes the sentence slightly repetitive (the idea of "them all" is already implied by "so many").

B. than she could feed – Incorrect comparison structure; "than" is used for comparisons, but here we need a cause and effect relationship.

D. that she could feed them all – This would imply the opposite, suggesting she could feed all of them, which contradicts the context.

E. more than she could feed them all – This phrase doesn’t form a grammatically correct sentence.