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Consider the following class: What line of code should be placed in the blank to create a class variable that keeps track of the most

Consider the following class:
What line of code should be placed in the blank to create a class variable that keeps track of the most recently used registration identifier?
Question 3 options:
a)
_lastID =0
b)
Pet.append(_lastID)
c)
Pet._lastID =0
d)
self._lastID =0
e)
None of the above

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