Answer:
The correct answer for: What sleep disease did many sailors suffer from? Why? Is: Insomnia because of the lack of a proper work-life balance schedule, privacy and work focused life.
Explanation:
To understand this answer we need to analyze the context. First of all the sailors travel almost all day, so they work almost all. In this case, sailors need to be available when expected, driving their lives towards work as not many jobs can do. But also, because they live in small and very populated environments they can't find the proper spaces to rest. They are very often surrounded by their job mate and in many cases can't achieve sleep but they rest.
