What are the five qualities that characterise an effective, reliable investigation?

What are the five qualities that characterise an effective, reliable investigation?
A . Objectivity Thoroughness Relevance Accuracy Timeliness
B. Objectivity Communication Relevance Accuracy Timeliness
C. Objectivity Thoroughness Relevance Experience Timeliness
D. Objectivity Thoroughness Analysis Accuracy Timeliness

Answer: A