Final answer:
Jill should obtain a trademark to protect her logo. A trademark is a symbol or name representing a company or product and can be renewed indefinitely as long as it is in use. The correct option is: 1) Trademark.
Step-by-step explanation:
In order to prevent others from stealing her logo, Jill should obtain a trademark. A trademark is an identifying symbol or name that is legally registered or established by use as representing a company or product. Examples include the Chiquita bananas logo, the Chevrolet emblem, or the Nike "swoosh." With roughly 1.9 million trademarks registered with the U.S. government, a firm can renew its trademark indefinitely, provided the trademark remains in active use. Intellectual property laws across the world protect such trademarks to ensure that ownership over an idea, concept, or image is respected internationally.