PLS HELP I WILL GIVE THE BRAINLIAST !!!!!!

How many people were included in the sample shown below?

A dot plot going from 0 to 6. There are 3 dots above 0, 5 dots above 1, 4 dots above 2, 3 dots above 3, 2 dots above 4, 0 dots above 5, and 1 dot above 6.

A: 6
B: 7
C: 17
D: 18