[Solved] When planning a comprehensive security system, the first step is designing _____, which use a combination of hardware and software for improving reliability-a way of ensuring availability in case of a system failure. A) fault-tolerant systems B) vulnerability-evade systems C) primary-defense systems D) database-resilient systems Micrographs: Photographic or digital images taken through a microscope to magnify objects that are too small to be seen by the naked eye. Cell Theory: Theory that all organisms consist of one or more cells, which are the basic unit of life; all cells arise by division of preexisting cells; and all cells pass hereditary material to offspring. Multicellular Organism: An organism composed of multiple cells that are specialized to perform distinct functions, contributing to the overall functionality and survival of the organism. Glucagon: Pancreatic hormone that encourages glycogen breakdown; increases blood glucose level.