Answer:
A. Use a smaller range.
Explanation:
We are given that,
The salesman want to give an impression that there was a larger increase in sales over the time period.
The salesperson should use a smaller range in the graph to show that there was an increase in sales.
If he uses a larger range, then the value of sales will spread out on the y-axis, resulting in a graph which will be flattened and hence, will not show any increase in the sales.
Hence, the salesman should use a smaller range.