What Is the Gravitational Field Strength on the Surface of the Earth

Multiple Choice

What is the gravitational field strength on the surface of the Earth? (G = 6.67 × 10^-11 N m²/kg², the mass of the Earth is 5.98 × 10²⁴ kg, and the radius of the Earth is 6.38 × 10⁶ m.)

A) 3.40 N/kg.
B) 6.20 N/kg.
C) 9.80 N/kg.
D) 10.1 N/kg.
E) 20.3 N/kg.