What will be the output of the following Python code?

class A:
    def __init__(self):
        self._x = 5       
class B(A):
    def display(self):
        print(self._x)
def main():
    obj = B()
    obj.display()
main()

A. To model real-world entities and their interactions B. To maximize efficiency C. To use fewer lines of code D. To create simple programs

A. A specific data type B. A built-in function C. An instance of a class D. A variable in Python

A. A blueprint for creating objects B. A built-in function C. A variable in Python D. A specific data type

A. Polymorphism B. Abstraction C. Inheritance D. Encapsulation