4. PART B: Which detail from paragraph 1 best supports the answer to Part A?
A) "The attack on Pearl Harbor"
B) "a decade of deteriorating relations"
C) "This breakdown began in 1931"
D) "in the summer of 1937 launched a full-scale attack

Attached is part A and the section of the text it’s referring to, please help! This is due in a few hrs thanks