Kellogg's sells many different breakfast cereals, including Corn Flakes, Rice Krispies, Frosted Flakes, Raisin Bran, and Special K. This is an example of the breadth of the Kellogg's product mix:

False.

Explanation:

Product mix: It the line of product that the company offers to the consumer under a single brand. It helps the new product to take advantage of the credibility of the popular product under the same brand.

The product mix includes 4 elements:

The breadth of product mix refer to the number of product line offered to the consumer. The company develop a breadth of product mix to reduce the risk of one product.

In the given case, Kellogg´s sells many different breakfast cereals is an example of the consistency element of product mix, wherein different closely related product is sold as Kellogs has the unique selling point of breakfast cereals.

the first successful, urban blues recording, selling more than 75,000 copies, was made in year 1920.

mamie smith recorded the first commercially successful example of the urban blues,   with the recording of “crazy blues”."crazy blues" was recorded on august 10, 1920, in new york city. within a month of the release of “crazy blues” it had sold 75,000 copies.