Both Cola and sugar cane undergo artificial vegetative propagation(where part of the plant are cut into portions and planted to produce new plants, called cutting).

On the other hand, both Ginger and Bryophyllum plants undergo the Natural vegetative reproduction. However, the difference is while Ginger uses the modified underground stem for its vegetative reproduction, the bryophyllum plant uses its fleshy leaves to produce new individuals.

Consequently, the correct answer is option C - bryophyllum