Which of these products or services is likely to have an inelastic supply in the short run?
a. cargo ships
b. haircuts
c. newspapers
d. staples

Cargo ships because even if demand goes up, the supply won't increase in the short run, because it will take months or years to build some more ships. That's inelastic supply.

You don’t list any options but the one that frets overspending and the consequences of that.