The correct option is C Due to the formation of small consumer groups
In the 1960s, there were food shortages, hoardings, black marketing, and adulteration of food and edible oil, which gave rise to an organised form of consumer movement.
Gradually, small consumer groups were formed that looked into the malpractices in ration shops and the overcrowding of the road passenger transport. As the years passed, more and more consumer groups were formed.
This pressurised the government to enforce COPRA, 1986.