A vessel displacing 18,000 tons has a KG of 50 feet. A crane is used to lift cargo weighing 20 long tons from a supply vessel. When lifting, the head of the crane boom is 150 feet above the keel. What is the change in KG?

A
0.11 foot
B
0.17 foot
C
0.25 foot
D
0.32 foot
E