<span>because of the Germans' decision to resume the policy of unrestricted submarine warfare.
Hope this helps.</span>
A- Trade
Explanation
(The internet told me so:))
<span>The answer is C. It limited social mobility.
The caste system of ancient India was a system in which people could not achieve a higher caste. For example, if a man was born in a poor family, he would never be able to get into a higher caste no matter how much he tries. It was a very rigid system.</span>
things that were growing, little by little, all around us. ... the beginning, unless one understood what the whole thing was in principle, what all these 'little measures' that no patriotic German' could resent must some day lead to, one no more saw it developing from day to day than a farmer in his field sees the corn growing.
