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You are copying your friend's notes from an astronomy lecture that you slept through. Select ALL the grammatically valid ways to report the professor's statement.
Professor Higgins's exact words: "Jupiter is the largest planet in our solar system."
The correct answers are Professor Higgins stated that Jupiter is the largest planet in our solar system and Professor Higgins stated that Jupiter was the largest planet in our solar system.
Normally, present tense verbs backshift to the past tense in reported speech (is $\rightarrow$ was). However, when reporting a general truth or a scientific fact that is still true, backshifting is completely optional! Both "is" and "was" are grammatically correct here.
The option using "if" is incorrect because this is a statement, not a reported yes/no question. The option using "been" is missing a helping verb (e.g., had been), making it grammatically incomplete.