Concept:A yes/no question must match the subject and verb phrase of the statement it answers.Explanation:The implied statement here is: John's parents have received the scripts.So the correct question must keep "John's parents" as the subject.The verb phrase must remain "received the scripts" in the present perfect tense.Thus, the matching yes/no question uses "Have John's parents" followed by "received the scripts".This makes option C the appropriate answer.Answer:C. Have John's parents received the scripts?