Answering "Yes" to which of the following questions would likely indicate that a worker is considered an employee?

Choosing to affirm the statement regarding whether the worker's services are so important that they have become a necessary part of the business is significant in determining the nature of the employment relationship. This indicates that the worker plays an integral role in the company's operations, which aligns with characteristics typically associated with employees rather than independent contractors.

In employment law, employees are generally those whose work is essential to the functioning of the business and who are under the control of the employer in terms of how and when the work is performed. In contrast, independent contractors usually maintain a degree of autonomy and are often hired for specific projects or tasks without the same level of dependency on the business. Recognizing the worker's critical role in the organization supports the classification as an employee, indicating a more permanent relationship with associated rights and obligations.

In contrast, the other options highlight factors that lean more towards defining independent contractors. For instance, the first option directly asks about being an independent contractor, the second about salary negotiations that often characterize contractor arrangements, and the last inquires about self-employment, which emphasizes the independence rather than an employee relationship. The correct choice focuses on the essential nature of the worker’s role within the company, reinforcing the classification of them as an employee.