Answer for Definition of State is B because the option A defines Sovereign State and not only "state". A state can be sovereign or non sovereign. For copper smelters it must be D, because workers are exposed to lethal doze of CO sometimes and statement says "may release", for mosses and lichens, it is both mosses and lichens because mosses can grow on bare rocks you can check on internet. Other questions too differe among answer keys but I am not sure of answers. Further, for pressure cooker too D seems correct.
:)