Respuesta :

Collective  bargaining  provide workers  with  invoice  to  work toward  advancement  of  the  society.  It  help  to  look  out the  best  interest  of  the  employee  by  setting  out  the  working  condition  for employees.The  working  condition  of  employee  include  wages ,working  hours,workers  safety  and  overtime.

Answer: gain power against employers

Explanation: Hope this helps :)