Which missile system is designed for rapid-response defense against anti-ship missiles?

The MK 49 Rolling Airframe Missile (RAM) system is specifically designed for rapid-response defense against anti-ship missiles, making it the correct answer. RAM is a short-range, quick-reaction, fire-and-forget missile system that excels at intercepting incoming threats, especially those targeting naval vessels. Its unique design allows for quick engagement with minimal reaction time, providing ships with effective self-defense capabilities in a hostile environment.

The system employs advanced guidance and control mechanisms to track and engage fast-moving targets, which is crucial when facing anti-ship missiles that travel at high speeds. Its effectiveness in high-sea-state scenarios and against various incoming threats demonstrates its role as a critical component of modern naval defense systems, particularly in addressing the increasing missile threat from adversaries.

Other missile systems listed, such as the Standard Missile (SM) and the Sea Sparrow Missile, serve different primary functions, including area air defense and longer-range engagements, while the Harpoon Missile is designed primarily for anti-ship strike capabilities rather than defense against incoming threats. Hence, the RAM stands out for its specific focus on quick response against anti-ship missiles.