(1) Erik finds that football tryouts are in two weeks and he wants to play. (2) Erik's parents say he can try out if he earns an A or B on his next two math tests. (3) Erik loves math, so studying for the tests will not be a problem. (4) Erik is determined to do well to get good grades, so he devotes two hours every night to studying math. Which sentence best shows an action that is intrinsically motivated?

sentence 1
sentence 2
sentence 3
sentence 4
I'll mark brainliest