FunText Is a Company That Owns an App Used for Text

Multiple Choice

FunText is a company that owns an app used for text messaging. It recently offered a membership extension of six months without any additional charges to its existing customers who had registered for a three-year membership. By doing this, which competitive strategy did FunText implement?

A) creation of a new service
B) product differentiation
C) locking in customers
D) locking in suppliers