Which of the following is the most important advantage enjoyed by the British First-Pa

Which of the following is the most important advantage enjoyed by the British First-Past-The-Post method？

A.A certain party would be overrepresented or underrepresented.

B.The party in office cannot escape responsibility for what has gone wrong during its term of office.

C.It is a proportional system.

D.The successful candidate is the one who receives the most votes in the single-member constituency.