What is the center of the data in the dot plot?

Number of Science Homework Assignments Each Week

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

a
2.5
b
2
c
3
d
5