Our current understanding of evolution is called a theory because
a. it has been supported repeatedly as new discoveries have been made.
b. proven to be exactly true as originally proposed.
c. corroborated by data that were gathered during a single experiment.
d. developed from the postulates of many scientists.

The correct answer is A. It has been supported repeatedly as new discoveries have been made

Explanation:

In science, a theory refers to an explanation about some aspect of the nature that has been proven multiple times, with different evidence and usually following the scientific method which makes the explanation classified as valid. This concept differs from a hypothesis which is a possible explanation but not a proven explanation. In the case of evolution, the explanation of it is part of a theory, considering since the theory of evolution was proposed by Charles Darwin in 1859 it has been supported through observations and other experiments, also, other hypothesis or possible explanations about evolution have been proposed, but refused as the results and new discoveries consistently support Darwin's proposal. Thus, our current understanding of evolution based on Darwin's proposal is called a theory because "it has been supported repeatedly as new discoveries have been made".

answer; silence;