Final Answer:
The innovative feature NOT present in Zoser's mortuary complex is the domed roof, making option D the correct answer.
Step-by-step explanation:
Zoser's mortuary complex, built during the Third Dynasty of ancient Egypt, is known for its groundbreaking architectural features. The stepped pyramid (option A) is a hallmark of Zoser's complex, representing an early form of pyramid construction. The columned hall (option B) and enclosed courtyard (option C) are also innovative elements, showcasing advancements in architectural design and spatial organization.
However, the domed roof (option D) is not associated with Zoser's complex. The use of domed roofs became prevalent in later architectural periods, notably during the Roman and Byzantine eras. Zoser's complex, primarily designed by the architect Imhotep, emphasized the use of stone and stepped structures rather than domed roofing.
Option D is the answer.