After throwing their sleeping bags into the backseat of their car, they...................more than 400 miles to reach their destination.
Correct Answer: C
Rationale: In this sentence, the correct form is 'drove' as it is the simple past tense of the verb 'drive.' The action of driving more than 400 miles occurred after they threw their sleeping bags into the backseat. 'Driving' (choice A) is in the present participle form and does not fit the context. 'Having driven' (choice B) is in the present perfect tense, which is not suitable based on the sequence of events. 'Had driven' (choice D) is incorrect due to the incorrect use of 'had' with the past tense form of the verb. Therefore, the correct answer is 'C: Drove.'
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