Final answer:
The maximum amount for 2018 that an employee may elect to defer to a 457 plan is $18,500.
Step-by-step explanation:
The maximum amount for 2018 that an employee may elect to defer to a 457 plan is $18,500 (option C).
This means that an employee can choose to contribute up to $18,500 of their income to a 457 plan in 2018.
It's important to note that this limit may change in subsequent years, so it's always a good idea to stay updated with the latest contribution limits.