Of the Following, Which Is a Quantitative Research Problem

Of the following, which is a quantitative research problem?

A) The purpose of this study is to explore the experiences of first year principals.
B) This study describes the decision making process of school board members during redistricting.
C) The goals of this study are to report what nurse practitioner-teachers should do to prepare today's nurses.
D) This study tests the effects of a new alternative education program on students' self-esteem.