Theory X and Theory Y are most closely associated withMultiple ChoiceFrederick Taylor.Frederick Herzberg.Douglas McGregor.Elton Mayo.William Ouchi.

Sure, let's break down the question step by step to find the correct answer.

1. Identify the Theories: The question is about "Theory X and Theory Y."

2. Understand the Theories:

   • Theory X: This theory assumes that employees are naturally unmotivated and dislike work. Therefore, an authoritarian management style is required to ensure tasks are completed.
   • Theory Y: This theory assumes that employees are self-motivated, enjoy their work, and seek out responsibility. Therefore, a participative management style is more effective.

3. Match Theories to Theorists:

   • Frederick Taylor: Known for Scientific Management, focusing on efficiency and productivity.
   • Frederick Herzberg: Known for the Two-Factor Theory (Motivation-Hygiene Theory).
   • Douglas McGregor: Known for developing Theory X and Theory Y.
   • Elton Mayo: Known for the Hawthorne Studies, focusing on social relations in the workplace.
   • William Ouchi: Known for Theory Z, which combines American and Japanese management styles.

4. Conclusion: Based on the information, Theory X and Theory Y are most closely associated with Douglas McGregor.

So, the correct answer is: Douglas McGregor.