Read the excerpt from The Evolution of Useful Things. The new two-tone style of painting automobiles was popular in 1925, but it presented considerable problems for auto manufacturers and body shops alike. In order to get a clean, sharp edge when applying a second paint color, the first had to be masked, of course, and this required that newspaper or butcher paper be fastened to the car body. If shop-brewed glue was used, it would sometimes stick so well that it had to be scraped off, more often than not pulling paint with it. Surgical adhesive tape was sometimes employed, but its cloth backing tended to absorb solvents from the newly sprayed paint and cause the masking materials to stick to the paint they were intended to protect. Clearly, existing means of masking had serious flaws. Which statement correctly describes how the central idea of this excerpt is developed? It is stated directly in the beginning of the paragraph and developed throughout. Supporting details are given before the central idea is stated at the end of the paragraph. It is hinted at throughout the paragraph, but the reader is expected to figure it out. It is revealed through a sequence of events and defined in the end of the paragraph.

The central idea of the excerpt has been given by option D; it is revealed through the sequence of events and defined at the end of the paragraph.

The excerpt has been about the new two-tone style automobile painting. It gives the idea that different problems have to be faced while performing the paint. A series of problems arose, and there had been flaws that hinders and the task difficult for body shops.

The automobile body shops have been come up with the use of newspaper, butcher paper, shop-brewed glue, and surgical adhesive tape to perform two-tone automobile paint.

The excerpt has been started with the availability and the options that have been used by the shops. It has been followed with the events that explain the drawback of every available option. The final conclusion reveals the central idea that existing means of masking have several flaws.

Thus, the central idea of the excerpt has been given by option D; it is revealed through the sequence of events and defined at the end of the paragraph.

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