What is a twin-engine cargo/passenger aircraft whose primary mission is carrier onboard delivery?

The C-2A Greyhound is specifically designed for carrier onboard delivery, which is essential for transporting cargo and personnel to and from aircraft carriers. Its twin-engine configuration provides the power and reliability needed for the short takeoff and landing operations that are often required on the deck of an aircraft carrier. The C-2A serves as a critical link for fleet logistics, enabling the timely delivery of supplies, equipment, and personnel as missions require, which is a key aspect of naval operations. Other aircraft mentioned serve different roles; for instance, the V-22 Osprey is a tilt-rotor aircraft that takes on vertical lift missions, while the S-3B Viking is primarily designed for anti-submarine warfare and reconnaissance. The C-130 Hercules, though versatile and capable of performing various roles, is not primarily focused on carrier delivery, making the C-2A Greyhound the correct answer for this specific mission profile.