Use the Divisibility Rules to Help Determine the Prime Factorization $3 \cdot 3 \cdot 7$

Multiple Choice

Use the divisibility rules to help determine the prime factorization of the number below. 63

A) $3 \cdot 3 \cdot 7$
B) $3 \cdot 3 \cdot 3 \cdot 7$
C) $3.5 .7$
D) $3 \cdot 3 \cdot 8$
E) none of these