Our monitor requested that ________. [ ]

A. all the class studied more carefully the problem

B. the problem was more carefully studied

C. with great care the problem could be studied  

D. all the class study the problem more carefully

我国宪法规定，国家对个体经济、私营经济实行：

A．鼓励、指导和帮助

B．引导、监督和管理

C．指导、监督和管理

D．鼓励、监督和帮助