For Questions , Use the Following Narrative

For Questions , use the following narrative
Narrative: Babysitting
Suppose a recent study of 1,000 teenagers in the U.S.found that 33% of them do babysitting to earn extra money.
-{Babysitting Narrative} Which of the following describes the sample for this example?

A) All teenagers in the U.S.
B) The 1,000 teenagers who participated in the study.
C) All teenagers in the U.S.who do babysitting for extra money.
D) The 33% of teenagers who do babysitting to earn extra money.