According to O*NET, it should be noted that the most common level of education that Stationary Engineers have is a high school diploma or equivalent.
- Stationary engineers are the people who control and maintain boilers. They also make use of their equipment to repair the ventilation systems.
- It should be noted that stationary engineers usually have a high school diploma or equivalent. They usually go through apprenticeship programs which usually run for four years.
In conclusion, the correct option is A.
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