The Mass of Mercury Is 3 $\times$ 10²³ Kg, and Its Radius Is 2440 Km

Multiple Choice

The mass of Mercury is 3.3 $\times$ 10²³ kg, and its radius is 2440 km. The acceleration due to gravity on the surface of Mercury is

A) 9.8 m/s².
B) 4.5 m/s².
C) 3.7 m/s².
D) 2.2 m/s².