Sentence 1: Japan was building an Empire in Asia. 
 Sentence 3: Japan needed to get America out of the Pacific 
 Sentence 4:  Japan decided on a pre-emptive strike 
 Sentence 5:  On December 7th Japan launched a surprise attack 
 Option 1: The United States didn't support this. 
 Option 2: The US and Japan were allies and helped each other tremendously.