Answer:A. by licensure and by endorsement
Explanation:
License by endorsement is a for those nurses that have a license to work as a Registered nurse within the jurisdiction of United States, but these are also applying for obtaining license to get the eligibility to do work out of the jurisdiction of the state and to another state.
The license by endorsement is given by the state board of medicine to do practice with similar standards.
Sarah work alone in her own business so, Yes Sarah is a sole proprietor.
A sole proprietor is an individual who owns and operates an independent business.
Sarah produces rosebushes' flower that she sells on the internet with help of online market and websites . She's been doing it for ten years.
So, from the above definition we can say that Sarah is a sole proprietor.
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