I regret ________ that you have failed the exam, but what you should do now is not to regret ______ so

much time but to seize every moment from now on. [       ]

A. to inform; wasting

B. informing; to waste

C. to inform; to waste

D. informing; wasting

反应温度对催化裂化产品分布和产品质量有何影响？