Book Nook uses workers for certain services including production editing, proofreading, and formatting. The workers have worked for the company over continuous periods of time, often exceeding two years. They are on teams with employees, share supervisors, are given keys to gain access to the facilities, and are required to use the office equipment and supplies. However, since the workers are categorized by Book Nook as independent contractors and signed IC agreements, the workers are paid for their services through submitted invoices and not through the company's payroll department. Which of the following is most accurate under the IRS's test for determining whether a worker is an independent contractor or employee? Question 4 options: a) The workers will be considered independent contractors since they submit invoices. b) The workers will be considered independent contractors since they do not meet all of the factors of IRS's test. c) The workers will be considered employees since Book Nook exercised significant control over the workers' behavior. d) The workers will be considered employees since the workers depend on Book Nook's business for the opportunity to render service