Twenty million years ago, Idoho was not the dry place as it is now. ______, it was warm and damp, covered with thick forests.

A．Thus

B．Besides

C．Rather

D．Otherwise

嗟夫!予尝求古仁人之心，或异二者之为，何哉不以物喜，不以己悲；居庙堂之高则忧其民，处江湖之远则忧其君。

下列句子中的“则”与上文中画线处的“则”意义、用法相同的一句是（）。

A．此则岳阳楼之大观也

B．复之以掌，虚若无物；手裁举，则又超忽而跃

C．公使阳处父追之，及诸河，则在舟中矣

D．居则具一日之积，行则备一夕之卫