List the Set in Roster Form $\{ x \mid x \in W , x \leq 6$

Multiple Choice

List the set in roster form. $\{ x \mid x \in W , x \leq 6$ }

A) $\{ 0,1,2,3,4,5 \}$
B) $\{ 1,2,3,4,5,6,7,8 \}$
C) $\{ 1,2,3,4,5,6,7 \}$
D) $\{ 1,2,3,4,5,6 \}$
E) $\{ 0,1,2,3,4,5,6 \}$