A Car Has a Mass of 2,000 Kg and Travels $20.0 \mathrm{~m} / \mathrm{s}$

A car has a mass of 2,000 kg and travels at $20.0 \mathrm{~m} / \mathrm{s}$ . If the drag force is $100 \mathrm{~N}$ , then the power the engines have to provide to keep moving at constant speed is

A) $3.9 \mathrm{~kW}$ .
B) $2.0 \mathrm{~kW}$ .
C) $4.2 \mathrm{~kW}$ .
D) $2.9 \mathrm{~kW}$ .
E) $3.4 \mathrm{~kW}$ .