Scientists say human activity contributes to climate change, but they do not agree on the rate_______ climate change may be developing.

A．with which

B．with that

C．at which

D．at that

法律关系的客体包括（ ）。

A．动产、不动产、无形财产

B．物、人身、行为、智力成果

C．人身、行为、货币

D．商品、货币、财产权利