An Important Advance in the Search for Life Elsewhere in the Solar

Multiple Choice

An important advance in the search for life elsewhere in the solar system was

A) the discovery of primitive life-forms on Mars.
B) the replication in laboratories of silicon-based substitutes for the most important carbon-based life molecules.
C) the discovery of liquid water on Europa, Ganymede, and various other places in the solar system.
D) the discovery in meteorites of the remains of microbes.