In your proof statement of the benefit, cite your proof source, in addition to relevant facts or figures about your product. Which of the following is a correct proof of a benefit?
a. Well, an article in last month's Appliance Report stated that the Williams blender is more durable than the other top 10 brands.
b. You'll get 10 percent more use from the Hanig razor.
c. Marathon is the most widely read magazine among persons with incomes over $25,000 per year.
d. Figures in Marathon magazine indicate that your sales will increase if you stock Majestic housewares in your store.