One advantage of radar is that it can be used during night or periods of low visibility.

One advantage of radar is that it can be used during night or periods of low visibility.

• A. Poor
• B. Low
• C. Clear
• D. Bright

Answer: (B)

Radar works by emitting radio waves and listening for their echoes, so it doesn’t rely on light to detect objects. That makes it especially useful when visibility is reduced by fog, rain, or darkness—conditions described as low visibility. The best fit is the word that forms the common phrase “periods of low visibility,” signaling these reduced-visibility conditions. While terms like clear or bright describe good visibility, andpoor is less the standard expression in this context, low visibility is the conventional way to express the idea radar helps during impaired sight.

Radar works by emitting radio waves and listening for their echoes, so it doesn’t rely on light to detect objects. That makes it especially useful when visibility is reduced by fog, rain, or darkness—conditions described as low visibility. The best fit is the word that forms the common phrase “periods of low visibility,” signaling these reduced-visibility conditions. While terms like clear or bright describe good visibility, andpoor is less the standard expression in this context, low visibility is the conventional way to express the idea radar helps during impaired sight.