Read the sentence: ‘My teacher explained that the Earth revolved around the Sun.’ Which analysis of the verb tenses is most accurate?

A. The sentence is incorrect; it should be ‘explains that the Earth revolves’.

B. The sentence is incorrect; it should be ‘explained that the Earth revolves’.

C. The sentence is correct as is, following standard backshifting rules.

D. The sentence is correct because both actions happened in the past.