Supreme Sandwiches, a nationwide sandwich shop chain, introduces a new sandwich in the Midwest to try out its marketing strategy before offering the product across the country. Thus, this sandwich shop is in the stage of product development process.
A) idea screening
B) commercialization
C) concept testing
D) business analysis
E) test marketing

The answer is option (E) Test marketing.

Explanation:

Test marketing is a product development stage during which a product and its projected mode of marketing are exposed to, or test run on a carefully selected sample population.

The purpose of such tests is to determine consumer reaction or response to the product. The results of the test would enable the shop chain or stores to decide whether to adopt or reject the marketing strategy before a full-scale launch of the product.

in terms of experimental research, mcdonald’s charging different prices in the two cities relates to