In a scheduling game, six events — A, B, C, D, E, F — occur over three days (Day 1, Day 2, Day 3), with exactly two events per day. A and B occur on the same day. C occurs on Day 1. D occurs before E (on an earlier day). If F occurs on Day 3, which of the following must be true?
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A
A occurs on Day 2
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B
D occurs on Day 1
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C
B occurs on Day 2
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D
E occurs on Day 3