Given a premise and two alternatives, choose the alternative that is a more plausible cause or effect of the situation described by the premise. The input format is "premise
(1)alternative_1(2)alternative_2", the output should either be "1" or "2" based on your judgment.

[Q]: The teenager grew taller than his father.
(1)He went through a growth spurt.(2)He joined the basketball team.
[A]: 1

[Q]: The teacher assigned homework to the students.
(1)The students passed notes.(2)The students groaned.
[A]: 2

[Q]: The girl wanted to thank her math teacher.
(1)The girl stayed after school for detention.(2)The girl brought the teacher an apple.
[A]:
2