If some activity creates positive externalities as well as private benefits, then economic theory suggests that the activity ought to be:

When you invest in a mutual fund

(A) Your money is invested in a variety of insurance policies. (B) You are guaranteed a fixed return on your investment. (C) Your money is invested in a variety of stocks and bonds. (D) You have easier access to your money than in a savings account.

In order to enjoy a rising standard of living standard, a nation's capital stock must grow faster than

a. the rate of depreciation b. the rate of inflation c. its population d. its financial assets e. its overall rate of economic growth