The Way That the Balanced Scorecard Should Be Adapted as a Tool

The way that the balanced scorecard should be adapted as a tool for monitoring sustainability which is generally considered to be the most useful approach, is:

A) Adding an additional sustainability perspective
B) Developing a separate, individually derived, sustainability scorecard in conjunction with the existing scorecard
C) Integrating environmental and social aspects into the four standard perspectives
D) There is no opinion as to which is the best option