Which of the Following Is an Example of Featherbedding

Which of the following is an example of featherbedding?

A) a craft union's restricting entry into its profession
B) a union-imposed wage floor
C) an increase in labor productivity that results from a decrease in quit rates
D) attempts to reduce the sale of nonunion goods
E) a construction workers union's requiring an unnecessarily large number of workers to do a particular job