Jeff Runs a Dry Cleaning Business in His City

Jeff runs a dry cleaning business in his city. He'd like to use customized location targeting for his business, so he's hired you to help him create an ad with customized location targeting. You tell Jeff that he has three choices, when it comes to customized location targeting in Google AdWords. Which of the following is not a valid choice for the customized location targeting?

A) Entering a physical address
B) Selecting a point on the map
C) Using a multi-point targeting approach
D) Using a triangulation approach based on a phone number