GMAT Critical Reasoning (CR) | Re: Business Owner: This new technology will allow us to track everything

Business Owner: This new technology will allow us to track everything that happens at our store, from delivery arrival times to the volume of sales made within each hour. Because we can now track which associates sell the highest volume within each time period, we will now know which of our salespeople are most effective at their jobs.

Which of the following is an assumption required by the argument above?

A. Different time periods during a given day are no more likely to have higher sales figures