Jill & Joel Co., owned by Jill and Joel Hudson, sells and installs above-ground swimming pools and hot tubs. The manufacturer of the hot tub a letter to Jill & Joel in which it offers to pay 60 percent of the advertising cost if the Hudson's run a newspaper ad featuring the hot tubs. Which of the following types of advertising is the hot tub manufacturer planning to undertake with the Hudsons?a) Vertical cooperative advertising.b) Vertical clearance advertising.c) Horizontal subliminal advertising.d) Horizontal clearance advertising.e) Institutional advertising.