Event 2 occurs a time â^†t after event 1. If event 2 was caused by event 1, which of the following must be true?
A. The distance between event 1 and event 2 can be any amount.
B. The distance between event 1 and event 2 is not more than c â^†t.
C. There are frames of reference in which event 2 is before event 1.
D. There are frames of reference in which event 1 is not related to event 2.
E. All of these choices are false.
B. The distance between event 1 and event 2 is not more than c â^†t.
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