C. Its the most sensible choice
I believe your answer is the first option. Hopefully I am helpful :)
A confined space has limited or restricted means for entry or exit, and is not designed for cinntinuous employee occpuancy. Confined spaces simply has limited space and accessiblity. Example of confined spaces are Gas tanks. Gas tanks point of entry and exit is only one and is barely large enough for a person to enter it.
Vitiligo refers to the loss of pigmentation in skin