Final answer:
The store cashier who steals $20 from the cash register is guilty of embezzlement.
Step-by-step explanation:
The store cashier who steals $20 from the cash register is guilty of d) Embezzlement. Embezzlement is a type of crime where a person who is entrusted with someone else's money or property fraudulently appropriates it for their own use. In this case, the cashier is stealing money from the cash register, which falls under the definition of embezzlement.