Select the table that represents a linear function. (Graph them if necessary.)

A. X| 0 1 2 3
Y| 2 3 6 11

B. X| 0 1 2 3
Y| 1 3 9 27

C. X| 0 1 2 3
Y| 0 1 4 9

D. X| 0 1 2 3
Y| 3 9 15 21