Final answer:
Without specific information on Endeavor's policies or applicable aviation regulations regarding Split Duty Period rest, an accurate answer to how many hours of rest Endeavor schedules is not determinable from the given options and information.
Step-by-step explanation:
The student's question asks for the duration of Split Duty Period rest opportunities scheduled by Endeavor. The options provided are 2, 4, 6, or 8 hours of rest. However, without specific reference to Endeavor's policies or the regulations governing split duty periods, it is not possible to provide a definitive answer. If we reference the choices to the provided information on durations based on the number of hours, none of the answers directly match the guidance given (a. is more than seven hours, b. is at most seven hours, c. is at least seven hours, d. is less than seven hours).
The most common standards for rest opportunities in aviation and similar industries typically align with regulatory requirements or company policies. Generally, these durations are designed to ensure sufficient rest for safety and operational efficiency. For specific companies like Endeavor, it would be best to consult the company's pilot contract or operational guidelines.