Jim the meteorologist has predicted fair weather all day but sees flashes of lightning followed by rolls of thunder. To calculate the distance to the lightning bolt, Jim should measure the time between the instant he first sees a lightning flash and the
A. instant he hears the beginning of the next thunder roll.
B. instant he hears the end of the next thunder roll.
C. instant he sees the beginning of the next lightning flash.
D. instant he hears the middle of the next thunder roll.
E. instant the lightning flash is over.
Answer: A
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