If the plane hadn't been delayed, I would have been able to attend my grandfather's funeral.A. 因为飞机没有延误，所以我能参加祖父的葬礼。B. 如果飞机没有延误，我原本能参加祖父的葬礼。C. 假如飞机不延误，我就能参加祖父的葬礼了。