One Consequence of Einstein's Ideas About the Speed of Light

Multiple Choice

One consequence of Einstein's ideas about the speed of light is that:

A) if two events take place at the same time, all observers will see that event simultaneously
B) whether events are seen as simultaneous or not depends on the motion of an observer
C) observers will always disagree on when an event took place
D) it is not possible to know when an event happened
E) moving observers can always know whether they are in motion