In a particular experiment on shopper behavior, two aisles in a retail store were painted differently. One aisle was painted with bright, cheerful colors whereas the other was painted in uniform black and gray. Over a three month period, it was noticed that sales from the aisle painted in bright and cheerful colors were nearly twice those from the aisle painted in black and gray. This study shows that the use of color has a significant impact on shoppers' purchasing behavior.
Which of the following, if true, would most strengthen the conclusion drawn in the experiment above?
【选项】
The aisle painted in bright colors contained only store brands; the aisle painted in black and gray contained premium brands.
选项是否正确？