Answer:
Pavlov's Dogs and Discovery of Classical Conditioning. Pavlov's dog experiments played a critical role in the discovery of one of the most important concepts in psychology. While it was originally discovered quite by accident, these famous experiments led to the discovery of classical conditioning.
Explanation:
A parallel structure always uses the same tense and structure in writing. The correct answer will be C.
I am pretty sure 2 is correct but im not sure the exact difference
That would be the stage directions. Stage directions are usually in brackets. You can also tell because it’s give the character directions on what do physically