Manufacturers of small computer devices, such as smartphones, often release a "beta” version of a new product to a small group of people so that the testers can use it in day-to-day life and report back to the manufacturer about how it could be further improved. The beta version is built and released after the designers have already built, tested, and analyzed an initial version at their factory. The initial version is tested like a model of the product, while the beta version is tested under real-life conditions. A. What best describes how the testing of the initial version and the testing of the beta version fit into the four stages of the process of technological design?

B. The beta version is tested during the second stage, when criteria are being determined, and the initial version is tested during the third stage, when the prototype is being analyzed.
C. The initial version is tested during the first stage to help determine what problems it has, and the beta version is tested during the fourth stage, when results are being reported.
D. The initial version is tested during the third stage to determine what needs to be improved, and the beta version is tested during the fourth stage to ensure that criteria are met.
The initial version and the beta version are both tested during the third stage to make sure that the beta version solves the identified problem and can be reported and sold to the public.