The correct answer is: A. Sting Ray Torpedo
The Sting Ray torpedo was the first guided weapon in the world which used a programmable digital computer. It was developed by the United States Navy in the early 1950s and entered service in 1958. The Sting Ray is a wire-guided torpedo, which means that it is guided to its target by a wire that is connected to the launching vessel. The torpedo has a range of up to 2,000 yards and can travel at speeds of up to 40 knots. It is armed with a 200-pound warhead.
The Sting Ray was a revolutionary weapon at the time of its introduction. It was the first torpedo that could be guided to its target with precision, and it gave the Navy a new capability against submarines. The Sting Ray was used extensively in the Vietnam War, and it is still in service today.
The other options are incorrect because they are not guided weapons that use a programmable digital computer. The Mk 46 torpedo is a wire-guided torpedo, but it does not use a programmable digital computer. The Air-Launched Cruise Missile (ALCM) is a cruise missile, but it is not guided by a programmable digital computer. The Tomahawk missile is a cruise missile that is guided by a programmable digital computer, but it was not the first guided weapon in the world to use such a computer.