What are two effective methods to acquire new subscribers?

A company has set out to increase their subscriber base. They hired a team of marketing consultants to develop an acquisition plan backed by data.

What are two effective methods to acquire new subscribers? (Choose two.)
A . Require customers to provide their email address when calling customer service.
B . Create an in-store SMS campaign that offers a discount for opting in.
C . Have customers opt in to email before they can shop online.
D . Ask for an email address when a customer makes a purchase in-store.

Answer: BD