The signal will () the men when it's time to go.

• A. Alert
• B. Inform
• C. Notify
• D. Warn

Answer: (A)

The signal is meant to trigger readiness and action. Alert conveys both waking someone to attention and prompting them to prepare to act, which fits a cue telling the men to be ready to go. Inform would just give information, without urging immediate action; notify is a formal notice, not necessarily about readiness; warn implies danger or risk. So alert is the best choice because it captures both awareness and the call to act when it’s time to go.