Cheetahs can run extremely fast because
A. Their ancestors who were able to run fast had an advantage and passed those genes on to their offsprings
B. They need to outrun lions
C. They are competing with stronger lions and hyenas for their food, so they need to be fast
D. Over time, they gradually built up speed as they adapted to faster and faster prey species
E. All of the options above
Answer: A
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