A semisubmersible floating in sea water displaces 20,000 long tons. She has vertical moments of 1,000,000 foot-long tons. What is the change in KG if 500 long tons are placed aboard at a KG of 120 feet?

A
1.22 feet upward
B
1.71 feet upward
C
1.75 feet upward
D
2.93 feet upward
E