Final answer:
The political group made up mostly of nobles and landowners in the early 1800s that wanted to return to a traditional monarchy were the C. Conservatives, who sought to uphold the status quo and retain their societal privileges.
Step-by-step explanation:
In the early 1800's, the political group made up mostly of nobles and landowners that wanted to return to a traditional monarchy were known as the Conservatives. These individuals were keen on preserving traditional systems of governance and were generally opposed to the radical changes sought by other groups like the Jacobins. The Conservatives advocated for a hierarchical social order and defended vested interests, including their own landed estates and positions of power within the traditional monarchical structure.