Which sentence is punctuated correctly?

D is correct because the sentence does not need a comma between “burrow” and the phrase “during the hottest part of the day.” In A, a comma incorrectly separates the verb phrase from that time phrase. B would be clearer with a comma after the introductory phrase “During the hottest part of the day,” and C incorrectly separates “sleeps” from “in a burrow.”

AI-written and checked against the verified answer.