Fiedler's (1967) Approach Suggested That the Effectiveness of a Leader

Fiedler's (1967) approach suggested that the effectiveness of a leader was contingent upon distinct factors or situational dependent variables. Fiedler developed the Least Preferred Co-Worker (LPC) scale and considered Situational favourableness by establishing complex set of interacting variables. Which option below most accurately describes these:

A) Task structure - A poorly structured type task typified by its clear set of stages and well tried and tested process. There are many options in terms its completion.
B) Leader-member relations reflects the degree of trust and confidence each party (leader and follower) has in each other, and how attracted the group members feel towards each other.
C) Positional power - those without of authority are judged to have strong power relationships, whereas, in contrast, those with high levels of authority are judged to have weak power relationships.
D) Leadership and Neutralizers - substitutes describe the characteristics of the task, organization, or followers that make leadership behaviours either irrelevant or unnecessary and render relationship and/or task oriented leadership impossible