Question ID:PT26 S3 Q21 Passage:The companies that are the prime purchasers of computer software will not buy a software package if the costs of training staff to use it are high, and we know that it is expensive to teach people a software package that demands the memorization of unfamiliar commands.  As a result, to be successful, commercial computer software cannot require users to memorize unfamiliar commands. Stem:The conclusion above follows logically if which one of the following is assumed? Correct Answer Choice:CChoice A:If most prime purchasers of computer software buy a software product, that product will be successful. Choice B:Commercial computer software that does not require users to memorize unfamiliar commands is no more expensive than software that does. Choice C:Commercial computer software will not be successful unless prime purchasers buy it. Choice D:If the initial cost of computer software is high, but the cost of training users is low, prime purchasers will still buy that software. Choice E:The more difficult it is to learn how to use a piece of software, the more expensive it is to teach a person to use that software.