Optimum Stress Level (OSL) refers to the stress level at which an individual:

Correct option is A

Optimum Stress Level (OSL) is based on the Yerkes-Dodson Law, which states that there is a level of stress or arousal at which an individual performs at their peak efficiency.

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Yerkes-Dodson Law:

 o This principle describes the relationship between stress and performance, represented as an inverted U-shaped curve.

o Low stress: Leads to boredom and lack of motivation.

o High stress: Causes anxiety, errors, or decreased performance.

o Optimal stress: Enhances attention, energy, and task efficiency.