Which passage from the article best supports the opinion that the students who stay at the Mars Desert Research Station are not planning to become astronauts?

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A

Some people are convinced that [a trip to Mars] is a real possibility by the year 2100.

B

The Utah training site isn't the only place to simulate Mars missions.

C

"[We want] to highlight not only the challenges of getting on Mars and being on Mars, but also what we are [doing] in order to make that happen."

D

"We do not expect that the people in our crews will be the actual people [who] go to Mars…" Zubrin said.

(This is from an achieve3000 article)