How can this be accomplished using NPSP?

A nonprofit organization wants to designate its donors into three categories, Gold, Silver, and Bronze, based on the total gift amount for that year .

How can this be accomplished using NPSP?
A . Create a picklist field that will display the categories based on the Total Gifts This Year field.
B Create a custom field on the Opportunity that will display the categories and a process in Process Builder to populate the value based on the Total Gifts This Year field.
B . Set up NPSP Levels for the categories based on Total Gifts This Year.
C . Create a custom field on the Opportunity that will display the categories and a custom trigger to populate the value based on the Total Gifts This Year field.

View Answer

Answer: C