Which module is used to define abstract classes in Python?  abcabstractabclassabstractclass

What does the  ABC  stand for in Python's  abc  module?  Abstract Base ClassAbstract Base CodeAbstract Base ConceptAbstract Base Compilation

What is an abstract class in Python?  A class that can be instantiatedA class that cannot be instantiatedA class with no methodsA class with only concrete methods

How do you define an abstract class?

Which of these keywords are used to define an abstract class?OptionsabstractabstAbstractabstract class

Which of the following is true about abstract classes in Python?  They can be instantiated directlyThey cannot contain concrete methodsThey can contain both abstract and concrete methodsThey must contain only abstract methods