Contact dermatitis requires depth descriptions

Which of the following BEST describes a catchall?

A. A chute to collect and drain runoff water B. A container constructed of a salvage cover to collect small amounts of water C. A salvage cover ballooned to float over household or commercial items to be covered D. A kit containing a special collection of tools stored in a designated toolbox on a firefighting apparatus

A substance used to kill disease-causing microorganisms is known as a

a. Antibacterial b. Purifier c. Microbicide d. Hydrogen sulfide