Factor the Composite Number 90 into a Product of Prime $30 = 2 \cdot 3 \cdot 5$

Multiple Choice

Factor the composite number 90 into a product of prime numbers, for example $30 = 2 \cdot 3 \cdot 5$ .

A) $2 \cdot 3 \cdot 3 \cdot 5$
B) $2 \cdot 2 \cdot 3 \cdot 3 \cdot 5$
C) $2 \cdot 3 \cdot 3 \cdot 5 \cdot 5$
D) $2 \cdot 2 \cdot 3 \cdot 5$
E) none of these