At North High School, everyone who went to basketball camp is on the basketball team. Some students on the basketball team are also on the track team. Ahmed went to basketball camp.
Based only on the information above, which of the following must be true?
A. Some members of the track team went to basketball camp.
B. Ahmed is on the basketball team, but he is not on the track team.
C. Some members of the track team are not on the basketball team.
D. Ahmed is on the basketball team.
E. Ahmed is on the basketball team and the track team.