Final answer:
Air traffic controllers commonly have education levels of high school diploma or equivalent, some college without a degree, or a post-secondary certificate. A Bachelor's degree is beneficial but not mandatory for the role, as the FAA provides specific training through its academy.
Step-by-step explanation:
The three most common levels of education that air traffic controllers earn are b. High school or equivalent, d. Some college, no degree, and f. Post-secondary certificate. While it is not uncommon for air traffic controllers to hold a Bachelor's degree, it is not a strict requirement for the position. The Federal Aviation Administration (FAA) requires that applicants have at least three years of progressively responsible work experience, a bachelor's degree, or a combination of post-secondary education and work experience equivalent to three years. They must also complete the FAA's Air Traffic Standardized Aptitude Test (AT-SAT) and attend the FAA Academy to receive formal training.