25 請問下列的程式執行結束後,陣列 grade 的內容為何?(A) grade[4] = {50, 60, 70, 80} (B) grade[4] = {80, 70, 60, 50} (C) grade[4] = {50, 70, 60, 80} (D) grade[4] = {50, 60, 80, 70}