Answer:
Brendan is exhibiting the characteristics of a A. Transactional leader.
Explanation:
Transactional leadership is characterized by the usage of reward and punishment in order to work with the group. In this case the leader promotes the group's compliance to get tasks to be done.
We can see that Brendan is using this method in order to increase employee productivity; awarding a bonus to the first employee to reach the monthly sales. This would most likely boost their productivity.