Which three are true? (Choose three.)
A.
If abstract class B directly extends abstract class A, class B must implement all abstract
methods declared in A.
B.
An abstract class CANNOT be instantiated.
C.
An interface can extend multiple interfaces.
D.
All methods in an abstract class must be abstract.
E.
If concrete class C extends concrete class B, and B implements interface A, then all methods
from interface A can be invoked on an instance of C.