Question

the existence of extraterrestrial life may never be proven, but this idea will become more scientifically acceptable over time if—
a no one disputes this idea in a scientific forum.
b hypotheses are made related to the idea.
c increasing scientific evidence supports the idea.
d alternative hypotheses are proposed and confirmed.

Explanation:

Scientific ideas gain more acceptance when there is increasing evidence to support them. Option A is incorrect as scientific ideas are often disputed. Option B is wrong because hypotheses related to the idea are tested and refined. Option D is incorrect as alternative hypotheses are proposed and tested, not necessarily confirmed.

Answer:

C. increasing scientific evidence supports the idea.