In Regard to the Additive Effect of Transformational Leadership and Transactional

In regard to the additive effect of transformational leadership and transactional leadership, which of the following is generally accepted as true?

A) Transactional leadership and transformational leadership are not contradictory styles but instead are complementary and can be used together.
B) The impact of transformational leadership on follower satisfaction is limited and only shown to occur when strategies are added to transactional leadership strategies.
C) There is no additive effect, as transformational leadership and transactional leadership have been proven to be contradictory in nature.
D) There is no relationship between transformational leadership and transactional leadership because one is a strategic approach and the other is a supervisory approach.