Final answer:
The strategy of hiring only locals in the country where a branch is located is known as B. Host-Country Recruitment.
Step-by-step explanation:
When a firm adopts a strategy of limiting recruitment to nationals of the host country where a branch is located, this is called Host-Country Recruitment. This approach can be a part of a broader international staffing strategy, which might also include offshoring or outsourcing to access cheaper labor markets or evade stringent labor and environmental laws. Corporations must also be aware of various anti-discrimination laws and ensure their hiring practices are in compliance with such regulations, regardless of the geographic location of their operations.