单选题：下列序列中哪个是最小堆？

下列序列中哪个是最小堆？ @[C](2)

A. 2, 55, 52, 72, 28, 98, 71
B. 2, 28, 71, 72, 55, 98, 52
C. 2, 28, 52, 72, 55, 98, 71
D. 28, 2, 71, 72, 55, 98, 52




A.2, 55, 52, 72, 28, 98, 71
B.2, 28, 71, 72, 55, 98, 52
C.2, 28, 52, 72, 55, 98, 71
D.28, 2, 71, 72, 55, 98, 52


答案：C