--- Does Mary work carefully?

---Yes. I think she works __________ in our class.

A．much carefully

B．more carefully

C．most carefully

D．much more carefully

在密闭容器中，下列反应已达平衡：aA（气）+bB（气）cC（气）+dD（气）+Q如果升高温度或降低压强，则C（气）的物质的量都增大，试判断下列各组关系，哪组是正确的