Which of these sentences from the article would be MOST important to include in a summary of the article?

A
On April 9, Spain announced a ceasefire, or a temporary period of peace, in its war with the Cuban rebels.
B
Soon afterward, lawmakers in the U.S. Congress declared Cuba’s right to independence.
C
Some of Spain's forces were stationed in the Philippines, which Spain also controlled.
D
The Spanish Caribbean fleet under Admiral Pascual Cervera was harder to track down.