Suppose that a building contractor is accused of haphazard use of asbestos roofing in decades past. many of the individuals who worked in these buildings and now have lung problems wish to sue the contractor. if the judge allows this large group of people to serve as the plaintiff in a single civil case, he or she is granting

class-action status

Explanation: Class-action is the term considered in the lawsuit that gives the permission to people in huge number that persist a common interest in any particular subject for suing or get sued in the form of group or cluster.

The case mentioned is the question describes about the permission of class-action status as the workers having larger group might get the permission to sue to contractor if they get positioned as plaintiff.

answer; i believe that the correct answer is ( rivers);

  b.

there are isolated pockets of farming, generally around rivers and oases, which are used for irrigation.