Which of the following is NOT true with respect to an active suspension? a. It can respond to irregularities in the road surface and raise or lower each wheel. b. It can automatically raise or lower the vehicle with changes in speed. c. It can prevent the nose and tail of the vehicle from diving or rising. d. It is a very basic and easy to diagnose suspension system.

The correct answer is d. It is a very basic and easy to diagnose suspension system.<br /><br />Active suspension systems are advanced suspension systems that use electronic control and actuators to adjust the damping force in real-time based on road conditions and vehicle dynamics. They can respond to irregularities in the road surface and raise or lower each wheel (option a), automatically adjust the vehicle's height based on changes in speed (option b), and prevent the nose and tail of the vehicle from diving or rising (option c). However, they are not considered basic or easy to diagnose suspension systems, as they require sophisticated electronics and control systems.