Answer:
A) Good lighting and maintenance
Step-by-step explanation:
As the question is talking about the detail that will help Justin stay safe and healthy, from the options given the one that adjust to that is good lighting and maintenance as good lighting will allow him to be able to see anything that may cause an accident like a stone in his way and maintenance will provide a facility that is in excellent conditions which can prevent an accident and allow him to perform his activities to be active.