The mental vision of how each construct will be measured is called a graphical depiction.

Which of the following statements about manufacturers' agents is true?

A) Manufacturers' agents are also called manufacturers' brokers. B) Manufacturers' agents most typically work for only one manufacturer. C) Manufacturers' agents have little control over the selling price of the products they carry. D) Manufacturers' agents have unlimited sales territories. E) Manufacturers' agents are entirely supervised by the manufacturer for whom they sell.

The main concept of relational databases was published in 1970 by:

A) Itzak Ben-Gan. B) Hoffer. C) Mills. D) E.F.Codd.