I’ll give a talk tomorrow. I’m thinking about_______.

A．what to say

B．how to say

C．what can I say

D．how can I say

凡在紧急排险中需拆除的建筑物、毁坏的其他设施的所有者，必须无条件地服从公安机关现场指挥员的指挥，履行拆除的义务。( )