Answer:
d. locally registering patents and trademarks.
Step-by-step explanation:
A licensor can be defined as an entity or party such as an individual or organization having an exclusive legal right over an industry and is saddled with the responsibility of granting legal rights or permissions to own, make or do certain things to others (licensees).
A U.S. licensor will be most successful at maintaining effective control over licensees and preventing them from voiding the contract by locally registering patents and trademarks.
A common law trademark can be defined as a protection or enforceable mark for a product name, logo, symbol or brand name used to distinguish goods and services prior to its registration with the state or federal government. Common law trademark is a trademark which is automatically received by an organization when a symbol is being consistently used in the normal course of business.