Rent Ceilings Set Below the Equilibrium Rent I

Rent ceilings set below the equilibrium rent i. create a deadweight loss.
Ii. increase search activity.
Iii. encourage landlords to charge a high price for new locks and keys, called "key money."

A) i only
B) ii only
C) i and iii
D) i and ii.
E) i, ii, and iii