Contingency theories of leadership are based on the belief that (a) there is no single style of leadership appropriate to all situations (b) there is a single style of leadership appropriate to all managers (c) there is a single style of leadership appropriate to all situations (d) none of the above [hint: Contingency theories of leadership are based on the belief that there is no single style of leadership appropriate to all situations as it will be dependent upon the interactions between the variables involved in a leadership situation and patterns of leadership behaviour.]