The Names of All 126 Students in a Professor's Class

Multiple Choice

The names of all 126 students in a professor's class are written on identical slips of paper, and the slips are placed into a large glass jar. Then, the professor selects 14 random slips from the jar.
Identify the kind of sample that is being used.

A) sample of convenience
B) simple random sample
C) systematic sample
D) cluster sample