Final answer:
The CDC, ADA, and OSAP recommend that biologic monitoring of all sterilizing equipment be conducted monthly to ensure instruments remain free of viable microbes.
Step-by-step explanation:
The minimum frequency recommended by the CDC, ADA, and OSAP for biologic monitoring of all sterilizing equipment is A. Monthly. Sterilization is a process critical in healthcare settings to ensure that all medical and surgical instruments are free of viable microbes, thus safeguarding patient health by preventing infections. According to these health organizations, conducting biological spore tests monthly ensures that sterilizers are functioning correctly and maintaining the necessary sterilization standards.