What was not a motivation for the cunard line to build the lusitania?

a: british scientist l's wanted to demonstrate the power to solar engines.
b: one of the cunard lines ships stalled in the middle of the ocean.
c: an american entrepreneur bought the white star line.
d britain and the cunard line were humiliated when germans had captured the trophy for the fastest transatlantic crossing.

(i think it's c or d)