Based on the Assumption That a Liquid-Conducting Core and Rapid

Based on the assumption that a liquid-conducting core and rapid rotation both are required for a magnetic dynamo to operate, which terrestrial planets would you expect to have magnetic fields?

A) only Earth
B) only Earth, Venus, and Mars
C) only Earth and Venus
D) only Earth and Mercury
E) Earth, Venus, Mars, and Mercury

Correct Answer:

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