Final answer:
Option B, stating that a large percentage of mall visitors can walk to Smithtown Mall, most strongly supports the argument that road construction is the more likely cause for the business closures, as it indicates the road issues affected those who relied on driving to the mall.
Step-by-step explanation:
The argument that road construction, rather than a nationwide recession, is the more likely cause of business closures in Smithtown Mall is addressed in the question. To strengthen this argument, we must look for information that specifically links the accessibility issues caused by the road construction to the decline in customer visits and store revenues.
Out of the options provided, the following option most strengthens the argument: B. A large percentage of mall visitors live in surrounding apartment buildings and can walk to the mall. This statement suggests that a significant number of the mall's customers were not as affected by the road construction as they could reach the mall on foot. This implies that the businesses that depended largely on foot traffic may have been less impacted, whereas the stores that went out of business likely relied more on customers who needed to drive to the mall, thus reinforcing the claim that the road construction was detrimental to those businesses.
Other options such as severe traffic on weekday mornings, low profit margins from the past, growth of online sales, or closures in competing malls do not directly support the argument related to the effects of the road construction on Smithtown Mall's businesses.