Concept:After a modal verb like "can," always use the base form of the verb, not past tense.Explanation:The sentence begins with "Can you," which is a modal verb phrase.The verb "picked" is past tense, which is incorrect here.It should be "pick" – the base form.Thus, the error is in part B: "picked me up."Correct sentence: "Can you pick me up from the airport?"Answer:B. picked me up