Which One of the Following Conclusions Could Be Drawn from a Descriptive

Which one of the following conclusions could be drawn from a descriptive study?

A) Approximately 80% of the students at Southside High School are planning to go on to college.
B) Students are more likely to appreciate classical music if they are exposed to it on a regular basis.
C) Concrete experiences help students better understand abstract ideas.
D) Children from two-parent families are more likely to do well in school than children from single-parent homes.