A Target of Opportunity can be engaged by ground, naval, or aircraft fire.

• A. Ground, Naval, or Aircraft
• B. Ground only
• C. Air only
• D. Naval only

Answer: (D)

The main idea here is that a Target of Opportunity can be attacked by any fires that can reach it, regardless of whether they come from the ground, sea, or air. A TOA is encountered unexpectedly, and the optimal response is to use whatever asset is available and capable at that moment, across domains if needed. That makes the best choice the one that includes ground, naval, and aircraft fire, because it recognizes all three avenues of engagement as valid options.

Choosing any option that limits engagement to just one domain doesn’t fit the flexibility of TOA’s nature. Ground-only excludes possible naval or air support; air-only excludes ground and naval options; naval-only excludes ground and air. The all-encompassing option best reflects the practical reality that TOA can be engaged by multiple types of fire depending on what assets are available and within range.