Which of the following offers a voluntary accreditation program of institutional animal care and use programs?

AAALAC, or the Association for Assessment and Accreditation of Laboratory Animal Care, is known for offering a voluntary accreditation program specifically designed for institutional animal care and use programs. This accreditation is aimed at promoting the humane and ethical treatment of animals used in research and education, ensuring facilities meet high standards of animal welfare.

By participating in AAALAC's accreditation process, institutions demonstrate their commitment to excellence in animal care, as well as compliance with applicable regulations and ethical standards. The process encourages institutions to continually assess and improve their animal care and use programs. In contrast, PHS, USDA, and OLAW do not offer an accreditation program; rather, they provide regulatory oversight and guidance related to animal research regulations and compliance.