Final answer:
The Project Management Institute (PMI) is the organization tasked with maintaining and publishing the PMBOK Guidelines, a key resource for project management standards and practices. Option c.
Step-by-step explanation:
The organization responsible for maintaining and publishing The PMBOK (Project Management Body of Knowledge) Guidelines is the Project Management Institute (PMI) option c. The PMBOK Guidelines are a set of standard terminology and guidelines for project management which the PMI continuously updates. The PMBOK is widely recognized and provides fundamental practices that are useful to achieve project management excellence.