In those plants whose pulp is of economical importance,
they are generally propagated by vegetative means because
They are generally propagated by vegetative to produce offsprings which are practically clones of their parent plants. If a plant has favourable traits, it can continue to pass down its helpful genetic information to its family. This is especially economically advantageous as it allows commercial growers to clone a particular plant to ensure consistency throughout their crops.
Thus, the correct answer is C.