According to the research, the correct option is D. The shoulder joint is an example of which functional class of Synovial joints.
What are synovial joints?
They are joints in which there is a viscous substance, called synovial fluid, which allows proper sliding and prevents friction between the joint components.
In this sense, the shoulder joint is called a synovial joint due to the presence of viscous fluid and an enarthrosis, that is, they allow rotation, flexion, extension, abduction, adduction and circumduction movements.
Therefore, we can conclude that according to the research, the correct option is D. The shoulder joint is an example of which functional class of Synovial joints.
Learn more about Synovial joints here: https://brainly.com/question/28256806
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