Will give 25 points for answering and brainier! Which problem solving strategy would be best to solve this problem?

To study for the spelling competition, Jose memorized 2 words from the list. The next day, Jose memorized 4 words from the list. The third day, Jose memorized 8 words from the list. If Jose continues, how many words will he memorize on the tenth day?
A. look for a pattern
B. work backwards
C. write an equation
D. guess, check and revise