Which two sets of method signatures can you use to achieve this goal?

You are developing an application that will manage customer records. The application
includes a method named FindCustomer.

Users must be able to locate customer records by using the customer identifier or customer
name.
You need to implement the FindCustomer() method to meet the requirement.
Which two sets of method signatures can you use to achieve this goal? (Each correct
answer presents a complete solution. Choose two.)

A.
Option A

B.
Option B

C.
Option C

D.
Option D