Which of the following statements can best describe the behavior of most thin people as ascribed by the passage

A．Thin people could never find themselves having enough time for leisure.

B．Thin people are seldom unable to find themselves having nothing to do.

C．Thin people are never lazy in doing things useful.

D．Thin people are fussily annoying and particularly disgusting.

( )又称为发盘、出价、报价。

A．要约邀请

B．要约

C．承诺

D．反要约