It is few people, _____ have come to ask for the position, ____ fit for the job. [ ]

A. who; who do I think is

B. that; I think is

C. that; who I think are

D. who; that I think are

如图所示，均匀光滑的小球静止在光滑的墙壁与木板之间，墙壁对小球的弹力为F₁，木板对小球的弹力为F₂，当墙壁与木板的夹角α增大时（α<90°）

A．F₁增大，F₂减小

B．F₁减小，F₂增大

C．F₁、F₂都减小

D．F₁、F₂都增大