Concept:A fire insurance policy with an average clause pays compensation in proportion to the insured amount relative to the actual value of the property.Explanation:Use the average clause formula:Compensation=Actual valueAmount insured×Actual lossFor Mr A:Amount insured =N30,000Actual value =N100,000Actual loss =N40,000Substitute into the formula:Compensation=100,00030,000×40,000=100,00030,000×40,000=100,0001,200,000,000=12,000Therefore, Mr A will receive N12,000.Answer:C. N12,000