Answer: The answer is option (B) Sole proprietorship.
Explanation: Sole proprietor can simply be defined as a one man business organization. It is a type of business organization that is fully owned and managed by one person. It is a common type of business entity. According to the passage, Dr. Harris owned perfect smile dental clinic, it was noted further that Dr. Harris employs a dental assistant and a secretary, Dr Harris is responsible for both of them salary as the risk and profit are not the concern of the two employee.