Answer: The U.S labor law
Explanation: The international market is made up of several companies and countries with unique labor laws and labor Relationships. The international market consists of different market players and different contributing factors that affects Businesses adversely than just the U.S Labour laws,an organization will be concerned with the U.S labour law if it is the only Country where it has Operations,but since it is an international entity more issues are available for it,such as Market penetration, building brand loyalty,access to credit facilities etc.