Question

optimum means :
most favorable conditions or greatest degree possible
extreme excess
enthusiastic and assured vigor and liveliness
unlawfulness by virtue of violating some legal statute

Explanation:

The word "optimum" means the best or most favorable condition. Among the given options, "most favorable conditions or greatest degree possible" aligns with this meaning. "Extreme excess" is about too much of something, not the best. "Enthusiastic and assured vigor and liveliness" is about energy and liveliness, not the best condition. "Unlawfulness by virtue of violating some legal statute" is about legality, not the best.

Answer:

most favorable conditions or greatest degree possible