Which of the following significant, game-changing insights were gained from the Rosetta spacecraft and Philae lander orbiting and landing on Comet 67P?
A. Comet 67P carries a rich load of organic molecules that could serve as the building blocks for life.
B. Comet 67P has never been exposed to high temperatures or violent impacts.
C. There is more dust than water rising on the surface of 67P.
D. All of these choices are correct.
Answer: D
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