Vegetative reproduction is reproduction by using vegetative organs of plants. Only higher plants can differentiate roots, stems and leaves, so it is a way of asexual reproduction of higher plants. It is impossible for lower plant cells to carry out vegetative reproduction, and it is sexual reproduction to produce offspring from seeds. . ACD is a sexual reproduction model with seeds; B, potatoes are tubers of plants, stems belong to vegetative organs, and reproduction with vegetative organs belongs to vegetative reproduction.

So choose B.