Answer:
C. nonstructured
Step-by-step explanation:
-Recurring decision refers to a decision that has to be made regularly.
-Ad hoc decision refers to a decision made for a specific situation.
-Nonstructured decision is a decision that can have multiple solutions that are correct and you don't have a form to define which one is the right option.
-Structured decision is when you make a decision using a process that has been established to manage a specific situation.
According to this, the answer is that in a(n) nonstructured decision, there may be several "right" answers, and there is no precise way to get a right answer.