A sociologist wants to know the opinions of students about online education. He obtains a list of 825 students who have completed an online course recently and mails a questionnaire to a randomly selected group of 150 of these students. Only 67 of the questionnaires are returned. Identify the population and the sample in this study. (4 points) a
The population is 825 and the sample is 67.

b
The population is 150 and the sample is 67.

c
The population is 825 and the sample is 150.

d
The population is 67 and the sample is 825.

e
The population is 150 and the sample is 825.