Which option correctly defines a scientific theory?

an explanation for observable facts that is supported by experimental evidence

a scientist’s best guess, or assumption, about the cause of a problem

a process of carrying out specific, well controlled tests in order to answer a scientific question

a tentative, informed answer to a scientific question

B?

I can't find it in my text

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I think it's A

Yes, option B correctly defines a scientific theory: "an explanation for observable facts that is supported by experimental evidence."

No, not b.

What does your text say?

Have you Googled scientific theory?