Multiple Choice
How have we been able to obtain samples of Martian rocks?
A) Rocks have been collected and returned from the Moon to Earth by astronauts,now identified as Martian rocks blasted from that planet by a massive impact.
B) Rocks have been blasted off Mars by impacts,and have landed on Earth as meteorites.
C) We have not yet been able to obtain any Martian rock samples.
D) Sample return missions have been flown in which a robotic rover collected rocks and returned them to Earth.
Correct Answer:

Verified
Correct Answer:
Verified
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