单项选择题
A. 直接插入排序 B. 简单选择排序 C. 堆排序 D. 快速排序
A. 3, 5, 7, 9, 12, 10, 15, 1 B. 3, 5, 9, 7, 12, 10, 15, 1 C. 3, 7, 5, 9, 12, 10, 15, 1 D. 3, 5, 7, 12, 9, 10, 15, 1