How Fast Must Two Deuterium Atoms Be Moving So They ${ } _ { 1 } ^ { 2 } \mathrm { H }$

How fast must two deuterium atoms be moving so they can overcome the Coulomb force of repulsion,and attain the necessary 10 ^{- 14} m for fusion? (m( ${ } _ { 1 } ^ { 2 } \mathrm { H }$ ) = 2.014 1 u)

A) 3.9 *10⁶ m/s
B) 1.3 *10⁶ m/s
C) 2.6 * 10⁶ m/s
D) 5.2 * 10⁶ m/s
E) 3.7 *10⁶ m/s