Whats the main task for "Deep Impact" this time？A．To visit other planets.B．To destroy the

Whats the main task for "Deep Impact" this time？

A．To visit other planets.

B．To destroy the comet.

C．To collect scientific data.

D．To test the possibility of unmanned spaceship.

请帮忙给出正确答案和分析，谢谢！

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