At a Distance of 14,000 Km from the Center $\mathrm { m } / \mathrm { s } ^ { 2 }$

Multiple Choice

At a distance of 14,000 km from the center of Planet Z-99, the acceleration due to gravity is 32 $\mathrm { m } / \mathrm { s } ^ { 2 }$ What is the acceleration due to gravity at a point 28,000 km from the center of this planet?

A) $8.0 \mathrm {~m} / \mathrm { s } ^ { 2 }$
B) $16 \mathrm {~m} / \mathrm { s } ^ { 2 }$
C) $4.0 \mathrm {~m} / \mathrm { s } ^ { 2 }$
D) $2.0 \mathrm {~m} / \mathrm { s } ^ { 2 }$
E) $128 \mathrm {~m} / \mathrm { s } ^ { 2 }$