The correct option is D All of these
Vegetative propagation is a kind of reproduction in plants, where a new plant is produced from any vegetative part of the plant, e.g. root, stem and leaf. It can be natural or artificial. Natural methods of vegetative propagation include runners, stolon, offset, leaf buds, tubers, etc. All these structures grow naturally. The seed is always produced sexually and thus propagation via seeds is not a method of vegetative propagation.