Which of the Following Is a Drawback of Transactional Leadership

Which of the following is a drawback of transactional leadership? 

A)  ​Transactional leaders never reward followers for good performance. 
B)  ​Transactional leaders often rely too heavily on discipline or threats to bring performance up to standards. 
C)  ​Transactional leaders have moral standards that put their interests before everyone else's. 
D)  ​Transactional leaders never punish followers for poor performance.