Answer: positive result from regulatory and economic environmental forces.
Step-by-step explanation:
Based on the information given, if Toyota builds a plant, then the decision would reflect positive result from the regulatory and economic environmental forces.
The regulatory forces depend impact how an organization will operate. It is part of the external marketing environment of a company whereby the political efforts has an affect on a company's marketing effort.
In this case, since there is a growing trend to "Buy American", if Toyota builds a plant, rather than importing, it'll represent positive result from regulatory and economic environmental forces.