Answer:
It enriched literature in China.
Step-by-step explanation:
I just did this I got a 100% trust me!
The answer would be A.
Explanation: First off, she did not separate her friends into different groups. Secondly, she only got information from the students who listen to music. She should've gotten information from the students who don't listen to music in order to compare her results. She needed to make the survey equal meaning that, she needed to survey the students who listen to music and the ones that don't.
