Answer:
Theory Y leadership
Step-by-step 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.