A car is travelling on a horizontal road at a constant velocity $v$ while a resistive force $F$ acts on it. The engine of the car has an efficiency of $25\%$. What is the input power to the engine?
- A$\frac{Fv}{4.0}$
- B$\frac{4.0}{Fv}$
- C$4.0Fv$
- D$\frac{4.0F}{v}$