challenge: What was the purpose of Briscoe's firing trials in 1981-1982 off the coast of Vieques, Puerto Rico?
  
  A. Testing the effectiveness of the 5 inch gun against naval targets
  B. Supporting the development of the Semi-Active Laser Guided Projectile (SALGP)
  C. Evaluating the ship's speed and maneuverability
  D. Practicing anti-submarine warfare tactics
  Answer: 