What can be used to display different text on the opportunity record depending on the number of days until the target close date?

Universal Containers wants to display a message when an opportunity close date is less than 60 days in the future.

What can be used to display different text on the opportunity record depending on the number of days until the target close date?
A . Workflow Update
B . Process Builder
C . Sales Process
D . Formula Field

Answer: D