The correct answer is C) They undermined the rigid social structure that gave privilege to aristocrats by encouraging a spirit of social mobility.
The statement that best evaluates how humanist ideas introduced by the Renaissance changed European society is "They undermined the rigid social structure that gave privilege to aristocrats by encouraging a spirit of social mobility."
During the Renaissance, the idea of humanism was developed focusing on maximizing the capabilities and beauty of humans. Human beings were reevaluated like never before during the Renaissance due to its beauty, value, nature, and dignity. Great ideas established by the Greeks and the Romas were reintroduced during this time.