Official 38 Lec 4
Question 4 of 6
According to the professor, what could have occurred when a protoplanet in the outer accretion disk reached a mass of five to ten Earths?

A.

It started to shed grains of rock and metal into the solar system.

B.

Its gravity began to pull in huge amounts of the surrounding gas.

C.

Its gravity caused clumps to form in the surrounding gas.

D.

It collided with smaller protoplanets.

正确答案:B

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