Is that right? Did this app turn into twitter?
The correct answer should be A
The correct sentence is:
Every day there are more comments, and they are hard to ignore. The antecedent of the pronoun "they" is "comments".
The suffix -ine in the word heroine refers to a female person. A hero is a main protagonist, or a brave man, but if you want to use a word for a woman to denote the same thing, you would add the suffix -ine to mark that this is a female gender. Hope this helps! :)