Which code segment should you use?

You need to add the script to populate event data on the form.

Which code segment should you use?
A . formContext.data.addOnLoad(myFunction)
B . formContext.data.removeOnLoad(myFunction)
C . formContext.data.entity.addOnSave(myFunction)
D . addOnPreProcessStatusChange
E . formContext.data.isValid()

Answer: D

Explanation:

IsValid() gets a boolean value indicating whether a l of the form data is valid. This includes the main entity and any unbound attributes.

Description: true if a l of the form data is valid; false otherwise.

Reference: https://docs.microsoft.com/en-us/powerapps/developer/model-driven-apps/clientapi/reference/formcontext-data/isvalid