Where contribution clauses apply, each insurer contributes to the loss in proportion to its amount insured compared with the total insurance available. The total insurance is $300,000 + $80,000 + $20,000 = $400,000. Company B’s share is $80,000 out of $400,000, or 20 percent. Applying that percentage to the insured loss of $200,000 gives $40,000. Therefore, Company B pays $40,000. Option A would understate Company B’s proportional share. Option B does not match the contribution formula. Option D is Company B’s full policy limit, but the loss is shared proportionately among all contributing insurers; Company B does not pay its full limit unless the proportional calculation and claim size require it. Contribution clauses prevent the insured from recovering more than the loss and allocate payment fairly between insurers covering the same subject matter and interest. Brokers must identify overlapping policies because contribution can affect recovery expectations and claim coordination. References/topics: Claims; contribution clauses, multiple insurance, proportional sharing, indemnity principle, claim settlement calculation.