Which of the following goods$/$services are likely very inelastic for current consumers?

a$.$

Fentanyl: a synthetic opioid implicated in the recent drug crisis in North America

b$.$

Rent: The money paid to a landlord for the purposes of occupying a property

c$.$

Live theatre: Going to a show$/$production at a local stage to watch a play or musical

d$.$

Fine dining: Eating out at a moderately to very expensive restaurant

e$.$

Cartier watch: A very high end expensive wrist watch

f$.$

Insulin: A hormone produced or administered that allows an animal to metabolize sugar