Question

why does collective bargaining increase the bargaining power of workers?
o its difficult for employers to replace their entire work force.
o collective bargaining prevents employers from using strikebreakers.
o labor is no longer a commodity when it is negotiated collectively.
o the reserve wage for union workers is much higher.

Explanation:

Collective bargaining involves workers negotiating as a group. Employers find it hard to replace all workers at once, giving workers more power in negotiations. Other options are incorrect as collective - bargaining doesn't prevent use of strikebreakers, labor remains a commodity, and reserve wage isn't the main reason for increased bargaining power here.

Answer:

A. It's difficult for employers to replace their entire work force.