Which research question would be most appropriate for a four- to five-page research paper? are teens that play sports less likely to have jobs at the same time? would cutting extracurricular activities anger students? is there a correlation between extracurricular activities and grades? how many teens participate in extracurricular activities every year?

The answer is C Is there a correlation between extracurricular activities and grades?

Explanation:

A research paper is a form of academic writing based on the original study on a specific topic by its author and the review and interpretation of the results of the research.  

The reason why “Is there a correlation between extracurricular activities and grades” research question would be most appropriate for a four- to five-page research paper is because it has to go through long process where we have to know the independent and dependent variable and it involves many calculations.    

the answer is:

when will (v) the books (n) be (v) due?

nouns refer to people (other than pronouns), places and things, whereas verbs describe actions and are usually part of the predicate of a sentence. finally, pronouns can work as nouns and identify the participants in speech.

in the example sentence, "will" is a verb part or auxiliary verb, "be" is an infinitive verb and "books" is a plural noun.