Based on the information in the article, which statement must be true?
O
A. The spy plane photos caused the United States to issue a
statement about the Soviet Union.
O
B. U.S. spying caused Cuba to want to increase its military defense
capabilities.
O
C. President Kennedy's order to set up a blockade was caused by the
Cuban announcement.
O
D. Khrushchev's statement was caused by the U.S. government
taking photos of Cuba.