Your silence implies countenancing his abject behavior; therefore please clarify your stand to him.

A．supporting

B．obscuring

C．concealing

D．assisting

关于布鲁纳教学四原则，具体是指的是（）。

A.动机、结构、序列和反馈四原则

B.行动、结构、序列和反馈四原则

C.动作、结构、序列和反馈四原则

D.动机、结构、序列和调整四原则