What detail in the article shows that rock music had a bad effect on ladybugs?
A.
He played loud music to ladybugs. He wanted to see what they would do.
B.
Ladybugs eat aphids. Aphids are smaller bugs.
C.
Then they would eat fewer aphids. Then the crops would not grow well.
D.
Rock music is not usually played loudly in a farm field.