The correct answer is A. positive style.
A positive style of leadership is a leadership style that focuses on motivating and inspiring followers to achieve their goals. This style of leadership is often characterized by a focus on positive reinforcement, such as offering rewards for good performance.
A negative style of leadership is a leadership style that focuses on controlling and punishing followers. This style of leadership is often characterized by a focus on negative reinforcement, such as threatening followers with punishment for poor performance.
An autocratic style of leadership is a leadership style in which the leader makes all decisions without consulting with followers. This style of leadership is often characterized by a focus on power and control.
A democratic style of leadership is a leadership style in which the leader makes decisions with input from followers. This style of leadership is often characterized by a focus on collaboration and consensus.
In the given question, the leader motivates his followers to work hard by offering them rewards. This is an example of a positive style of leadership.