Which of the following is an example of a pure public good?

Two candidates are running for election as mayors of New York City that was recently impacted by Superstorm Sandy. In their election platforms, both candidates supported spending very similar amounts on hurricane protection

This similarity is most likely the result of A) both candidates necessarily having the same preferences towards risk and protection. B) the Principle of Minimum Differentiation. C) both the candidates realize that hurricane protection is a public good. D) politicians only take efficiency into account and hence all candidates will suggest the efficient outcome.

A unique resource can serve as

A) an economic profit B) a sunk cost C) an entry barrier D) none of these choices