Respuesta :
A Common is my choice for this question. There are plenty of commercials advertising this.
Answer:
A) Common
Explanation:
Fall arrest according to OSHA, or the Occupational Safety and Health Administration is one of the most common risks at work, specially in jobs that require to work at 6 ft or higher, and the most common is the personal fall arrest system in construction, they are often harnesses that are used by the workers and protects them from falls.