Correct Option: D

Windows NT is designed for multi-processor systems. It supports symmetrical multiprocessing which enables multiple microprocessors to be productive at all times, increasing overall system throughout and taking advantage of available processing power. Multiprocessing enables multiple tasks or applications to run in parallel on different microprocessors. Personal workstations are designed to operate with more than one microprocessor in order to take advantage of the multiprocessing capabilities of Windows NT (The GIS Book by G.B. Corte)