What does the discovery of deep－freeze bacteria mean to us, according to the passage？A．We

What does the discovery of deep-freeze bacteria mean to us, according to the passage？

A．We might one day find form. of life on other planets.

B．Scientists from NASA made a great progress in discovering the microorganisms

C．To retrieve any life that has died long ago is impossible.

D．Alaska is a place abundant in microorganisms.

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