Mia made a pattern that followed the rule “Add 6.” Which pattern follows this rule?

A.
3, 9, 15, 21, 27, 33

B.
2, 8, 12, 18, 22, 28

C.
4, 9, 15, 20, 26, 31

D.
1, 6, 11, 16, 21, 26