A business that invests in a federal "CD" (certificate of deposit, where they basically loan the government money in order to gain interest payments on it) would be earning:
Select one:
a. passive income.
b. active income.
c. balanced income.
d. stock income.

( May be this is helpful)

Explanation:

Active income:

Active income refers to income received for performing a service. Wages, tips, salaries, commissions, and income from businesses in which there is material participation are examples of active income.

Passive income;

Passive incomes include earnings from a rental property, limited partnership, or other business in which a person is not actively involved—a silent investor, for example. Portfolio income is considered passive income by some analysts, so dividends and interest would be considered passive.

Balanced income;

PIMCO Balanced Income Strategy aims to provide attractive current income as well as capital appreciation over the long term by combining the higher capital appreciation and dividend-paying potential of equities with the lower volatility and attractive income potential of fixed income.

Stock Income;

An income stock is an equity security that pays regular, often steadily increasing dividends. Income stocks usually offer a high yield that may generate the majority of the security's overall returns. ... Income stocks may have limited future growth options, thereby requiring a lower level of ongoing capital investment.

Income Stocks, also known as dividend stocks, are the equity stocks that provide consistent and regular income in the form of a dividend to its buyers.

metallurgy is your answer

the "study of metals and the process of refining ("

note that it says metal. metallurgy has the word "metal" in it, and so is most likely your answer (and is your answer).

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