Bacteria that may form endospores include A. E. coli. B. Pseudomonas and Micrococcus. C. Clostridium and Bacillus. D. Enterococcus and Deinococcus.

C. Clostridium and Bacillus.

Explanation:

Bacillus and Clostridium are the gram-positive bacteria and form endospores. Endospores are the resistant dormant structures formed by some gram-positive bacteria.

These bacteria form the endospores within their vegetative cells. The endospores are highly resistant to environmental stress conditions and make these bacterial genera the dangerous pathogens.