Final answer:
The Puritan value that most influenced the emerging neoclassical style was simplicity and plainness.
Step-by-step explanation:
The Puritan value that most influenced the emerging neoclassical style was A) Simplicity and plainness. Neoclassicism, which emerged in the 18th century, was a reaction to the excesses of the Baroque and Rococo styles. The neoclassical artists sought to create art that was rational, ordered, and restrained, reflecting the principles of ancient Greek and Roman art.