Question

Which is true about scientific theories?

A: They are the result of a single experiment.
B: They are the results of many experiments over a long period of time.
C: They are proposed by scientists who wish to investigate a new topic.
D: They are only based on the most recent evidence.

Answer 1

they are results of many experiments over a long period of time

Answer 2

B: They are the results of many experiments over a long period of time.

That characteristic of science is known as "Cumulative", other options are incorrect and only this option can be the answer of your question!

Hope this helps!