Struggles to maintain independence as a buffer state between china and russia.
a. south korea
b. taiwan
c. north korea
d. mongolia

Mongolia struggles to maintain independence as a buffer state between China and Russia. The correct option among all the options that are given in the question is the fourth option or option "d". Mongolia is a country that is economically weak but has huge amount of em[pty land and a very small population.

from the conditions of the working class in england by friedrich engels,the main idea is :

manchester's leaders hoped to oppress its working class to benefit factory owners.

Answer: - the gas is compressed