Moon: Not magnetic
Compass: Permanent Magnet
MRI: Not Magnetic
First i would like to discuss the design with the head of the construction crew that are capable of understanding the engineering part, then ask him if the design is feasible, if its realistic, if it is safe to be house and if it is safe to work on by the workers. and it would be his task to deliver it the others
Answer:
A: Large fins
Explanation:
Large fins help it propell through the ocean fast.