How Many Nanometers Are in 3

How many nanometers are in 3.5 × 10 ^{− 2} meters?

A) 3.5 × 10⁷
B) 3.5  ×  10 ⁹
C) 2 × 10 ^{− 5}
D) 3.5 × 10 ^{− 7}
E) 3.5 × 10 ^{− 11}