Final answer:
The dinosaur skeletons from the great dinosaur rush were primarily studied by paleontologists Cope and Marsh during the Bone Wars, which accelerated the discovery and understanding of dinosaurs. The correct option is D.
Step-by-step explanation:
The many dinosaur skeletons collected during the great dinosaur rush were primarily studied by Cope and Marsh. These two paleontologists were known for their intense rivalry, which became famously known as the Bone Wars. During this period in the late 19th century, they aggressively raced to discover and describe new dinosaur species. Their efforts significantly contributed to the field of paleontology and the accumulation of knowledge about dinosaurs and prehistoric life.
Both Cope and Marsh collected vast numbers of fossils, and their competition led to a rapid expansion in the collection of dinosaur skeletons. Their work is a prominent part of the history of paleontological science and natural history museums. Notable for their huge impact on the field, Cope and Marsh's discoveries still serve as an important resource for modern paleontology.