A manager called her workgroup together and presented a problem to them: They needed to accomplish some extra work in less time than usual. Her employees suggested a plan for handling the situation, and she accepted it. According to McGregor's Theory, the manager's leadership style could be described as

Theory Y leadership

Explanation:

Douglas McGregor stated 2 theories of leadership style, based upon how a leader deems it necessary to keep his subordinates motivated and efficient.

Under Theory X, the leader employs authoritative measures since under this theory, the assumption being people are disinclined towards work and to make them work efficiently, coercive means need to be adopted by a leader.

Under Theory Y, the leader assumes a participative approach wherein he/she makes his team participate in decision making, giving them more autonomy and respecting their viewpoints. This theory works in a scenario wherein the team is dedicated and up for any challenges management throws at it.

In the given case, the manager used McGregor's Theory Y since she called together a group, presented a problem, asked for their suggestions and willingly accepted them.