Who took part in the study?
A. Teachers and parents.
B. Students and their teachers.
C. Students and their parents.
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A.isB.wasC.were
A. is
B. was
C. were
A.afternoonsB.afternoonC.in the afternoon
A. afternoons
B. afternoon
C. in the afternoon
A.driverB.teacherC.friend
A. driver
B. teacher
C. friend
A.behindB.in front ofC.at
A. behind
B. in front of
C. at