Mark the letter A, B, C, or D to indicate the sentence that is closest in meaning
Volunteerism is on the rise in the United States, especially among retired persons.
More and more American people, especially the retired, do volunteer work.The number of volunteers in the United States is increasing faster and faster.More retired people in the United States start doing charity work.More American people, especially the retired, refuse to be voluntary.Hướng dẫn giải:Dịch: Chủ nghĩa tình nguyện đang gia tăng ở Hoa Kỳ, đặc biệt là ở những người đã nghỉ hưu.
