The lightest ship that's subject to the mandatory reporting regulations, traveling at 5.0 knots, collides with a large stationary adult right whale of maximum size. As sometimes happens, the whale remains stuck on the prow of the ship after the collision. By how much does the speed of the ship change as a result of the collision? Give your answer in knots.

A. 0.95

B. 1.1

C. 2.5

D. 4.1