math issue

The average number of high school students per school that have smart phones.

Determine how to apply the first basic step in a statistical study in this situation. Choose the correct answer below.

A.The population is all schools. The researcher wants to estimate the average number of high school students per school that have smart phones.

B. The population is all high school students that have smart phones. The researcher wants to estimate the average number of high school students per school that nothing do not have smart phones.

C.The population is all schools. The researcher wants to estimate the average number of high school student per school that nothing do not have smart phones.

D.The population is all high school students that have smart phones. The researcher wants to estimate the average number of high school student per school that have smart phones.