He made a long speech ______ (只暴露出他对这门学科一无所知)

A．Evidence — conclusion.
B．Analysis — confirmation.
C．Statement — support.
D．Statement — support--restatement.

A．Because they cannot stand the continual nagging of their children.
B．Because they have to give in to their children’s demands.
C．Because they are deeply moved by their children’s honesty.
D．Because they can be considerate of their children’s needs.