39. The coast guard placed a navigation ________ near the dangerous reef area to warn passing vessels. (A) buoy (B) bounty (C) band (D) boy

49. What can be inferred about the strategic purpose of these non-military drills? (A) They replace full-scale naval exercises. (B) They aim to provoke direct conflict. (C) They focus solely on technical exchanges. (D) They allow responses to provocations without escalation.