What will be the output of the following Python code?

class change:
    def __init__(self, x, y, z):
        self.a = x + y + z
 
x = change(1,2,3)
y = getattr(x, 'a')
setattr(x, 'a', y+1)
print(x.a)

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

A. Using the class keyword B. Using the define keyword C. Using the classdef keyword D. Using the class method

A. Instances of a class B. Built-in functions C. Special data types D. Global variables

A. Using the class name and parentheses B. Using the create() method C. Using the new keyword D. Using the object() method