How can an app builder meet this requirement?

UniversalContainers uses a custom object called Projects. When managers assign projects they set a custom field on the Uroject called Estimated Hours. Once set, users should be able to decrease but not increase the value

How can an app builder meet this requirement?
A . Create a formula default value for the custom field.
B. Create a formula held that uses the PREVGROUPVAL function
C. Create a validation rule that uses the ISCHANGED function
D. Create a validation rule that uses the PRIOR VALUE function.

View Answer

Answer: D