Correct Option: B

Some of the benefits of Mushroom cultivation are:
(a) it has been found to coincide with decrease of incidents of breast cancer;
(b) Spent residues such as those obtained after cultivation of edible mushrooms could be a better source of bio- logically pretreated substrates for biogas production; and
(c) Mushrooms can be grown on virtually all types of available wastes; and
(d) agricultural waste recycling can be achieved through controlled cultivation of mushrooms.