Final answer:
An employer must furnish a security bond for a work permit holder when the work permit is issued, as a guarantee of compliance with repatriation and other employment requirements.
Step-by-step explanation:
An employer must furnish a security bond for a work permit holder when the work permit is issued (option c). This is a mandatory requirement that ensures the employer is liable for repatriation costs and complies with other stipulated requirements during the employment of the work permit holder. The security bond is typically a form of bank guarantee or insurance, and it needs to be ready before the foreign worker arrives in the country. It's important to note that the exact rules can vary depending on the country and specific governmental labor regulations.