The 'Outside-In Approach' of Measuring Sustainability Performance Refers To

The 'outside-in approach' of measuring sustainability performance refers to:

A) Develop several key lead indicators first,then for each lead indicator managers can derive a number of lag indicators.
B) Develop several key lag indicators first,then for each lag indicator managers can derive a number of lead indicators.
C) Develop measures from within the business,then these measures are 'fed through' to external reporting
D) Measures are determined externally by outside forces e.g.government regulations,these measures then influence the development of internal measures.