Which sentence demonstrates consistent and correct verb tense usage?

The correct answer to the question "Which sentence demonstrates consistent and correct verb tense usage?" is Option D: She had finished her work before the deadline arrived..

The other options — A) Yesterday, she walks to the store, buys groceries, and returns home., B) Before he left, he packs his bags and locks the door., C) As the sun rose, the birds began to sing and chirped merrily. — are incorrect for this ACT Exam Prep question. As explained above: Option D uses the past perfect 'had finished' to indicate an action completed before another past action ('deadline arrived'), which is grammatically correct and consistent. The other options mix pas…