Which of the following architects were the most influential in Thomas Jefferson's re-design of Monticello?

a. Palladio and Robert Adam

b. Vignon and Robert Adam

c. Soufflot and Vignon

d. Palladio and Soufflot

The answer is a. Palladio and Robert Adam influenced the redesign of Monticello.

Explanation:

Early in his life, Jefferson showed great interest in architecture and read books that had much information about European classical architecture. His first version of the Monticello was greatly influenced by architect Andreas Palladio, and also by Robert Adam whose works not only influenced Jefferson's thoughts on Monticello, but the development of Western architecture as well.