Which of the Steps in Systems-Thinking Is Illustrated in the Following

Which of the steps in systems-thinking is illustrated in the following example?
The hour after severe trauma is identified as the "golden hour," in which early intervention can have dramatic benefits on the outcome.

A) Identify key factors or influences that impact an outcome
B) Estimate the relative strength of each of the influences
C) Examine the interactions between factors
D) Identify bottlenecks
E) Identify leverage points