According to Potts, a railroad engineer
A needs to be prepared for unusual events.
B should consult with the fireman about safety decisions.
C is at great risk when there is a loose rail on the tracks.
D is most efficient after a restful nap.
According to Potts, a railroad engineer
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The correct answer is A: needs to be prepared for unusual events.
Explanation: Railroad engineers must be vigilant and ready to handle unexpected situations that may arise during their work to ensure safety and proper operation of the train. Being prepared for unusual events is critical in this profession. If you have more questions or need further assistance, feel free to ask!