The functional requirements categorize the different functions that the system will need to perform in order to gather the documented mission/business needs. The functional requirements describe the elements such as quantity, quality, coverage, timelines, and availability. Answer: C is incorrect. The performance requirements comprise of speed, throughput, accuracy, humidity tolerances, mechanical stresses such as vibrations or noises. Answer: A is incorrect. Human factor consists of factors, which affect the operation of the system or component, such as design space, eye movement, or ergonomics. Answer: D is incorrect. The operational scenarios provide assistance to the system designers and form the basis of major events in the acquisition phases, such as testing the products for system integration. The customer classifies and defines the operational scenarios, which indicate the range of anticipated uses of system products.