You must ___ food and clothes to those who have suffered from the heavy floods.

A．supply

B．offer

C．give

D．provide

一个项目的设计估算为100000美元，在决定是否采用这个估算是时候，我们预期这个估算的正确范围应该是：（）。

A、+10%to-15%

B、+25%to-10%

C、+10%to-5%

D、+10%to-25%