Hand signals must be given from a point where they can be plainly seen.

• A. Clearly seen
• B. Heard clearly
• C. Plainly seen
• D. Not visible at all

Answer: (C)

The important idea here is visibility. Hand signals must be given from a location where the person receiving them can plainly see them, so the command is clear and can be acted on without delay. Using the exact phrase plainy seen reinforces that the signal must be obvious and unambiguous to the observer, not just audible or faint. This prevents misinterpretation and helps ensure safe, coordinated movement. Signals you can’t clearly observe can lead to mistaken actions, which is why options about hearing the signal or signals not being visible don’t fit.