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.
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.