Suppose the Speed of Light Is Determined Experimentally to Be $\times$

Multiple Choice

Suppose the speed of light is determined experimentally to be 299,796 ± 4 km/s.If the total path length for your interferometer is exactly 11.0 m,how big an error in the time required for the light to travel through the apparatus corresponds to the uncertainty (±4 km/s) in the speed of light?

A) 4.9 $\times$ 10^-13 s
B) 2.7 $\times$ 10^-3 s
C) 3.7 $\times$ 10^-8 s
D) 4.9 $\times$ 10^-10 s
E) 9.2 $\times$ 10^-12 s