Final answer:
The correct option is c) Quaternary ammonium compound. The high-level disinfectant with very little odor that does not require activation or mixing is a Quaternary ammonium compound.
Step-by-step explanation:
The high-level disinfectant with very little odor that does not require activation or mixing is:
c) Quaternary ammonium compound
Quaternary ammonium compounds, also known as quats, are commonly used as disinfectants and sanitizers. They are effective against a wide range of bacteria, viruses, and fungi. Quats are easy to use, stable, and have a long shelf life. They are often used in healthcare settings, food processing facilities, and households.