Please Help me !!

Question

Sentence 9:
They emphasized the importance of good maternal and child health care, including the administering of vaccines?

1- replace They with it
2- change emphasized to emphasize
3- change the spelling of importance to importants
4- insert a comma after importance
5- remove the comma after care

I'm not sure in this one

Answer 1

It could be 1, but we can't tell because we don't know the antecedent.

I prefer to think 5 is wrong.