Identify the sampling technique used.

at a local community college, five statistics classes are randomly selected out of 20 and all of the students from each class are interviewed.
a) cluster
b) stratified
c) systematic
d) random
e) convenience

Heptagon is the correct ans

None of those are technically correct. 9.7 x 104 is actually 1,008.8, but if that answer was a choice, it would be that one. if you meant 9.7 times maybe a thousand or more or divided by 10 or more, than the answer choices would be correct, but other than that, they actually arent.