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What evidence do asteroids provide about the nature of the first planetesimals?a. The largest asteroids may be examples of the original planetesimals; they had differentiated, developed molten metal cores, and sometimes lava flows on their surfaces.b. The largest asteroids may be examples of the original planetesimals; they had radioactive decay in their cores and evidence of volcanism in the past.c. The smallest asteroids may be examples of the original planetesimals; they had radioactive decay in their cores and evidence of volcanism in the past.d. The smallest asteroids may be examples of the original planetesimals; they had differentiated, developed molten metal cores, and sometimes lava flows on their surfaces.

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