Express the Number in Decimal Form $9.1 \times 10 ^ { - 5 }$

Multiple Choice

Express the number in decimal form. $9.1 \times 10 ^ { - 5 }$

A) $0.0000091$
B) $0.00091$
C) $0.000091$
D) $0.00000091$
E) $9.10$