Question

Mary Leakey's discovery of fossil footprints in volcanic ash at Laetoli was important because:
a. It warned locals of the presence of a nearby active volcano.
b. Fossil animal footprints had never before been discovered.
c. The volcanic ash had preserved the footprints of at least two bipedal hominids.
d. It proved that hominids manufactured and used stone tools prior to the origin of bipedalism.

Answer

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