Which one of the following Federal Reserve monetary policies, when pursued in line with the U. S. government’s fiscal policies, would help increase aggregate demand during a period of high unemployment（）

A. An increase in the reserve requirements for financial institutions.

B. A decrease in the discount rate.

C. An increase in the margin requirements at brokerage firms.

违法事实确凿并有法定依据，行政机关可以当场处罚的有（）

A.甲酒后驾车，对其罚款人民币50元

B.甲故意毁坏交通标志，对其罚款100元

C.甲企业销售变质食品，对其罚款1500元

D.甲企业违反劳动安全法规，责令停产整顿