Which phrase describes a lighting pattern of 60 flashes per minute?

• A. Single flashing
• B. Quick Flashing
• C. Look out
• D. 60 flashes per minute

Answer: (D)

The key idea is how a lighting pattern is described by its rate. When a description states the exact frequency, it directly communicates how often the light flashes. “60 flashes per minute” is that direct description, and it corresponds to a rate of about one flash per second. The other phrases don’t specify the rate: “single flashing” implies only one flash, not a rate; “quick flashing” is vague and not a standard rate description; and “Look out” is a warning phrase, not a description of the flashing pattern. So the phrase that explicitly states the frequency best matches the pattern described.