Answer:
A. backward induction
Step-by-step explanation:
Based on the information provided within the question it can be said that Elly should use a backward induction strategy to make her decisions. This term refers to moving backwards from the end of a problem, in order to choose the best set of actions for the solution. Since Elly has many variables she should just state the problem that she is currently facing and choose the best solution for every step of the way.