When negotiating a new contract, the local teachers' union made several requests of the school board $($their employer$).$ These requests align with some of the basic objectives of unionization. Identify these objectives by using the drop$-$down list.

a$.$ Drop average number of students per classroom from $30$ to $26.$

b$.$ Lower out$-$of$-$pocket cost of health care premiums by $$100$ per month. Select

c$.$ Increase salary scale by $3\%$ to account for cost$-$of$-$living increases. Select

d$.$ Prohibit the school board from hiring non$-$union teachers. Select

e$.$ Redefine the process for teacher layoffs to ensure due process for teachers with seniority$.$