Final answer:
The change in draft reading is 3 inches.
Step-by-step explanation:
The question asks about the change in draft reading in inches. The given options are a) 1 inch, b) 2 inches, c) 3 inches, and d) 4 inches. To report the change in draft reading, we need to select the correct option which represents the amount of change. Therefore, the answer would be:
c) 3 inches