She may have missed the train,        she won’t arrive for another hour.

A．in that case

B．in this case

C．by which case

D．in which case

如图所示，闭合电键S后，A灯与B灯均发光，电流表A₁、A₂的读数分别为I₁、I₂，当滑动变阻器滑动片向下滑动一段后，电流表A₁、A₂读数变化的大小分别为△I₁、△I₂，则下列说法中正确的是

A．A灯变暗

B．B灯变暗

C．I₁、I₂都变小

D．△I₁＜△I₂