Question: Please select all true statements from the below. a An abstract class has at least one pure virtual function. b A pure virtual function is

Please select all true statements from the below.
a
An abstract class has at least one pure virtual function.
b
A pure virtual function is one whose definition simply returns 0.
c
virtual functions can provide a common language for many classes so that a polymorphic pointer can be used equally well when pointing to any derived object.

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