In Java, Interfaces are considered more flexible than abstract classes for which one of the following reasons? (select one option listed below)

-	A class can implement an unlimited number of interfaces but can only extend one class.

-	An interface can have both abstract and concrete methods but an abstract class can have only abstract methods.

-	An interface can have variable data members but an abstract class cannot.

-	An interface can model a strong is-a relationship while an abstract class cannot.