Ayala is a building contractor. The name of her company is Beautiful Builds. She has employees who work in the office and at building sites. Ayala hires some contractors who have their own employees and some who have no employees. The employees and contractors will earn more than $600 in the current tax year. Which of the following statements is correct? a) Ayala's employees must complete Form W-4. The contractors who have employees must complete Form W-9. b) Ayala's employees must complete Form W-4. All contractors must complete Form W-9. c) Ayala's employees must complete Form W-4. d) Ayala's contractors and employees must complete Form W-4