A, B & C
This phenomenon is defined as relativity of simultaneity by Albert Einstein.
Depending on the motion of an observer, the observer may perceive a distinct event occurring at a specific time differently from another observer with different motion.
Explanation:
This is stipulated in Albert Einstein's theory of special relativity that stipulates that the two distinct events that occur at the same time but at different places in space may appear differently to different non-accelerating observers at different vantages points (or reference frames). This is due to the interrelated nature of space and time hence it called space-time.
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