The correct option is D Agave
The asexual method of reproduction in plants aided by vegetative structures such as leaves, stems, roots etc., also called vegetative propagules, is known as vegetative propagation.
Bulbils are fleshy vegetative buds which take part in vegetative propagation. Bulbils of Agave germinate which still on inflorescence and thus show vivipary.
Leaf buds of Bryophyllum and rhizome of ginger help in vegetative propagation.