Assets minus liabilities equals

One reason why adverse selection problems arise in health insurance markets is that

A) sick people are more likely to want health insurance than healthy people. B) because of advances in medical technology, people are living longer. These medical advances are costly and drive up the price of insurance for everyone. C) fewer men and women are choosing medical careers because of the increase in the cost of malpractice insurance. D) the average age of citizens of the United States has increased in recent years, and will continue to increase over the next 20 to 30 years. As older citizens retire, more and more of their medical bills will have to be paid by younger workers.

In a liquidity trap:

a) monetary policy is very effective in changing income and output. b) fiscal policy is ineffective in changing income and output. c) monetary policy is ineffective in changing income and output. d) monetary policy is somewhat effective in changing income and output in the short-run.