Critics of union shop agreements that argue these agreements violate employees' individual freedom by depriving them of a free choice about where to work. These critics argue they are protecting workers:

A) Right to work
B) Seniority rights
C) Free rider rights
D) Job placement rights

Critics of union shop agreements argue that they violate employees' right to work, as they mandate that employees must join or support a union in order to work at a particular company. These critics believe that workers should be able to choose whether or not to join a union, and should not be forced to do so as a condition of employment. Protecting employees' right to work is therefore their main concern.