Answer:
The correct answer is letter "C": calculate the expected value of each course of action.
Explanation:
A decision tree is a graphic and analytic form of representing the events that can arise after taking a decision at a specified moment. Decision trees help us take a more accurate decision from the probabilistic view in front of the wide variety of decisions available. It allows us to portrait a problem and calculate the amount of work necessary.
Therefore, decision trees are useful to understand the value each path that could be selected carries.