An Education Expert Is Researching Teaching Methods and Wishes to Interview

An education expert is researching teaching methods and wishes to interview teachers from a particular school district. She randomly selects ten schools from the district and interviews all of the teachers at the selected schools. Does this sampling plan result in a random sample?
Simple random sample? Explain.

A) No; no. The sample is not random because teachers in small schools are more likely
To be selected than teachers in larger schools. It is not a simple random sample
Because some samples are not possible, such as a sample that includes teachers from
Schools that were not selected.
B) Yes; yes. The sample is random because all teachers have the same chance of being
Selected. It is a simple random sample because all samples have the same chance of
Being selected.
C) Yes; no. The sample is random because all teachers have the same chance of being
Selected. It is not a simple random sample because some samples are not possible,
Such as a sample that includes teachers from schools that were not selected.
D) No; yes. The sample is not random because teachers in small schools are more likely
To be selected than teachers in larger schools. It is a simple random sample because
All samples have the same chance of being selected.