The three questions of economics best in making decisions about

production

consumption

usage

expenditures

production

Explanation:

The three questions  of economics are:

Economics helps to make rational decisions in putting production tools into the best optimum use in order to satisfy the insatiable wants. The problem of what to produce depends on what particular want a producer is interested in satisfying. The means and the tools falls in the aspect of how to produce. How to produce tackles the problem of effectively rationing the scarce resources. For whom to produce addresses the problem of the consumer and the targeted market.