Which organization has set the de facto standards for project management techniques?

Answer: C - The Project Management Institute (PMI) is the industry-recognized standard for project management practices

 C : The Project Management Institute 

The Organization which sets the de facto standards for project management techniques is Project Management Institute (PMI).

I would say Project Management Institute that set the standards but I truly believe that we do not need to consider these standards as something carved in stone. We have to change!