—I wonder _____.

—Zebras. [ ]

A. what do they call these animals

B. how they call these animals

C. what they call these animas

D. how do they call these animals

建设工程施工前，施工单位负责项目管理的技术人员应当对有关安全施工的技术要求向监理人员作出详细说明，并由双方签字确认。