Velma passes Mort at a high speed. According to Mort, his clock has progressed by one hour while Velma's clock progressed by only 40 minutes. What does Velma observe?
A) Mort's clock progressed by one hour while Velma's clock progressed by 80 minutes.
B) Mort's clock progressed by 40 minutes while Velma's clock progressed by one hour.
C) Mort's clock progressed by one hour while Velma's progressed by 40 minutes.
D) both clocks progressed by one hour.
E) The answer cannot be determined, because we don't know Velma's speed.
B
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