What does the emergency package's manifold contain?

The emergency package's manifold contains two emergency extension selector valves, which are critical components in managing hydraulic systems during emergency conditions. These valves are specifically designed to allow for the manual extension of landing gear in the event of a hydraulic failure. They play a crucial role in ensuring that the aircraft can maintain control and execute a safe landing, even when normal hydraulic systems are compromised.

While the other options present components that are essential in different contexts—such as hydraulic pumps that provide fluid power, pressure gauges that indicate system status, and a central control unit for overall system management—none of these are part of the emergency package's manifold. The primary focus of the manifold is to facilitate emergency operations, which is why the presence of the two emergency extension selector valves is particularly significant.