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