Answer: Option (b) is the correct option
Step-by-step explanation:
Labor agreements are the agreements between some amount of skilled workers or their seller and employer for recruiting them for specific work.
Seniority stage is important in terms of labor agreement as it provides them seniority points for their full time working. It measures length of service of employees and accordingly provides privileges and other benefits .It also helps in promotion of employee when certain seniority and service length is reached as per firm norms .
Other options are incorrect because seniority stage does not offer retirement plans requirement, childcare and family issue acknowledging and grievance filing process as per labor agreement .Thus, the correct option is option(b).