Grady pulled out a set of glossy files with charts that compared waterproofing properties for his roofing materials against the competition's materials. Before delving into the numbers, he told the buyer that he "wanted to share data on water repellency and water proofing of roof tiles." How is Grady using the sales aid? * 1. summarizing the key benefits of a presentation aid 2. explaining how the charts were compiled 3. presenting the sales aid in the sales process 4. giving the selling reason for showing the sales aid hurry please