138.假設殖利率固定不變，債券愈接近到期日時，下列敘述何者正確？甲。折價債券價格會越接近債券面額；乙。溢價債券價格會越近債券面額；丙。溢價債券價格會遠離債券面額 (A)僅甲、乙(B)僅甲、丙(C)僅乙、丙(D)甲、乙、丙