Communication is one of the big ones. For example, if you have a hard time in something in class it’s always good to go and talk to the teacher about it. This can also work with changing deadlines or creating a good space for you to work. However, this is all done through good communication skills.
Although "the girls" is in plural form, "each of the girls", the subject, is in singular form.
Therefore, the correct answer is c. her, for it corresponds with the subject.
Hope this helps~
1 noun
2 adjective
3 pronoun
