She _________ it, but that she saw it with her own eyes.  [ ]

A. couldn't have believed

B. couldn't believe

C. can't believe

D. didn't believe

如图所示，a、b、c为三个完全相同的灯泡，L为自感线圈（自感系数较大，电阻不计），E为电源，S 为开关．闭合开关S，电路稳定后，三个灯泡均能发光．则（　　）

A．断开开关瞬间，c熄灭，稍后a、b同时熄灭

B．断开开关瞬间，流过a的电流方向改变

C．闭合开关，a、b、c同时亮

D．闭合开关，a、b同时先亮，c后亮