A large foreign automobile manufacturer was considering where to build a new manufacturing plant in the United States. They were making which type of decision?

They made Unstructured choices

Explanation:

Unstructured decisions are the kinds of decisions that involve judgment, observation, and perspective to fix the problem.

Unstructured implies "decision processes not occurring in quite the same manner and for which there is no fixed and clear collection of orderly answers in the organization."

Therefore, this decision must be count in an Unstructured decision.