Possessives and Attributives

Q. Hello, I am copyediting an article and wish to know what the plural form of “master’s degree” is. I believe it should be “masters’ degrees,” as this would be most logical, but I would appreciate your input. All of the online forums I follow have different opinions regarding this matter, and no dictionaries provide a plural form, so I would like to clear up the matter with you. Thank you very much.

A. The “master’s” part of the phrase stays singular: master’s degrees.