Which two actions should the architect recommend to UC?

Universal containers (UC) would like to enable self – registration for their salesforce partner community users. UC wants to capture some custom data elements from the partner user, and based on these data elements, wants to assign the appropriate profile and account values.

Which two actions should the architect recommend to UC? Choose 2 answers
A . Modify the communitiesselfregcontroller to assign the profile and account.
B. Modify the selfregistration trigger to assign profile and account.
C. Configure registration for communities to use a custom visualforce page.
D. Configure registration for communities to use a custom apex controller.

Answer: A,C