Answer:
Option A. July-August.
Explanation:
Phillips family spent each month on groceries. The amount of money in each month is shown in a graph.
Approximate amount in each month was spent :
March : $450
April : $400
May : $400
June : $500
July : $300
August : $ 500
Sep. : $480
Oct. : $420
From the graph given, there is a greatest month to month increase in spending occur in July to August (from $300 to $500).
So Option a. July-August is the correct answer.