Answer:
The answer is
b. Peter Drucker
d. Henri Fayol
e. Fredrick Taylor
Explanation:
Peter Drucker believed that managers should be leaders which means those working together should act as a team.
Henri Fayol in his 14 principles of management stated as Espirit de Corps which indicated team building as an important principle.
Fredrick Taylor in his 4 principles emphasized on cooperation, non individualism which focuses on team building and group working efforts
