Incomplete question. The options read;
a. A manager always has the ability to influence others; a leader may not.
b. A manager has a formal title and authority.
c. A leader may either be a manager or a nonmanager.
d. All managers perform four major functions: planning, organizing, leading, and controlling.
Answer:
c. A leader may either be a manager or a nonmanager.
Explanation:
it is not true that a leader may be either be a manager or a nonmanager as the very essence of leading involves managing/motivating others into action.
Hence, a leader should have the ability to manage people, although having the ability to manage does not mean that a leader would always have the ability to influence others, because others may easily refuse to be influenced by a leader than when dealing with a manager.
