PLS HURR!1!1!1!1 What is the scope of the variable hardness?

class pencil:
color = 'yellow'
hardness = 2
class pencilCase:
def __init__(self, color, art):
self. color = 'black'
self. art = 'wolf'
def __str__(self):
return self. color + " " + self. art
# main part of the program
pencilA = pencil()

A) limited to the pencilCase class

B) limited to the main part of the program

C) limited to the pencil class

D) accessible to all parts of the program