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)