Automated production methods are only attractive when they

If the purpose of a tax is to raise revenue, it would be best for government to place the tax on which of the following goods?

a. a non-essential good, such as holiday travel b. a good whose demand curve is highly elastic c. a good that has several close substitutes d. a good whose demand curve is highly inelastic e. a good whose demand curve is unit elastic

Marginal utility is always a positive number

Indicate whether the statement is true or false