Final answer:
Tabletop sterilizers c) are commonly used for small-scale sterilization, employing moist heat to effectively kill microbes, including spores, in laboratory and clinical settings.
Step-by-step explanation:
The true statement about tabletop sterilizers is that c) They are commonly used for small-scale sterilization. Tabletop sterilizers, such as autoclaves, employ moist-heat sterilization to sterilize items and are highly effective at killing a broad range of microbes, including hardy spores. These devices are ideal for use in laboratory and clinical settings where a complete eradication of all vegetative cells, viruses, and endospores from equipment is essential, but they are not suited for large-scale operations, do not operate solely on chemical sterilants, nor do they operate without electricity.