Which two options can be used to populate a custom metric so that it shows on forecast grid?

Which two options can be used to populate a custom metric so that it shows on forecast grid?
A . Implement a record trigger flow on Account Product Forecast (APF)
B . Implement an apex trigger on Account Product Forecast (APF)
C . Used to recalculate all forecast button on the account forecast settings page
D . Implement an apex trigger on Account Product period Forecast (APPF)
E . Implement an record trigger on Account Product period Forecast (APPF)

Answer: D,E