When a leader in a given situation is the basic and competent person of knowledge in that field and sufficient ability, for which he can make a certain decision for the group, which does not require the approval of superiors, he can exercise: A) His authority over making the decision, without the opinions of others, as long as the decision is not qualitative and does not affect the progress of work in the group B) His authority over making the decision, without the opinions of others, as long as the decision is qualitative and affects the progress of work in the group C) His authority over making the decision, based on the opinions of others, as long as the decision is not qualitative and does not affect the progress of work in the group D) His authority on making the decision, with the approval of the superior, as long as the decision is qualitative and affects the smooth progress of the work in the group