By birth? i think? do you mean like how did they get in a certain caste? because then it would be by birth. but if you mean like what were the castes, i forget.
Conservation should be given to smaller units to protect them from competition and provide more employment opportunities. Bigger firms should not be given protection.
<u>Explanation:</u>
The conservation which is important for the economy is the conservation given to the industries and the manufacturing units which are at smaller level to give employment opportunities to the people of the economy and protect them from competition.
But the conservation and protection to bigger firms should not be given, these should be exposed to competition so that they work in more efficient way and provide more choices to the people in the market.
The answer is D because they fought against the United States and Western Europe alliance NATO .