Nabisco used a free-standing rack in the shape of a bus to promote its Ritz and other cracker products. The goal of the sales promotion was to maximize the consumers' attention to lunch box and after-school snacks. The "bus," which provided storage for the featured products, was placed in a high-traffic area of U. S. grocery stores. This type of sales promotion is referred to as a

point-of-purchase display              

Explanation:

Point-of-purchase display: The term "point-of-purchase display" is also denoted as "POP display" is described as one of the different marketing materials or advertising that is being placed next to any merchandise that it has been promoting. However, these items are being generally located or present in any checkout area or some other location whereby that specific purchase decision is being made.

In the question above, the given type of sales promotion is referred to as a point-of-purchase display.

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