Which of the following person is considered a research participant $($select all that apply$)?$

A patient whose tissue was removed to determine whether they had a condition requiring treatment.

A patient with a particular condition whose tissue was removed to help scientists better understand that condition and how to treat it$.$

An employee of a college who must fill out a job satisfaction survey anonymously for the Human Resources department.

That same college employee responding to a survey from a labour relations professor aimed at measuring job satisfaction in unionized vs non$-$unionized academic staff