Habib wants to cover a kitchen wall in ceramic tile. The wall is 42 feet by 10 feet.

What is the side measure of the largest square tile that he can use to cover the whole wall so there is no overlap or cutting?
Halp Pls

A. 1 foot

B. 2 feet

C. 6 feet

D. 10 feet

GCF(10,42) = 2