Tim Gave His New Intern the Task of Computing the Tracking

Multiple Choice

Tim gave his new intern the task of computing the tracking signal for a brand-new forecasting technique.The first month's data was available so the intern pounded away at his computer keyboard for the better part of an hour before finally running up to Tim brandishing a piece of paper with the answer.Which of these numbers should Tim not see for the first month's tracking signal result?

A) 0
B) 1
C) -1
D) 2