The answer is D. Its the only one which would make sense.
USSR (Russia) was led by Stalin
Option C, It restricted the power of Black Codes already in force is the right answer.
The Black codes in the united states were the laws that limited the freedom of African Americans. These black codes were passed by the Southern states in 1865 and 1866. Enacted in July 1868, the 14th Amendment in the constitution of America proposed the Citizenship, the Equal Protection and the Due process under the law. This Amendment was an acknowledgement to the problems related to former slaves following the American Civil War. The Equal Protection clause declared that "a state may not refuse any person within its jurisdiction the equal protection of the laws".
Capitalism: is an economic system in which the factors of production are privately owned and money is invested in business ventures to make a profit.
(Basically Capitalism referred to people who believed that the government should not interfere with businesses)
Socialism: the factors of production are owned by the public and operate for the welfare of all.
The main difference between the two was that in capitalism, business owners wanted to run everything themselves. They didn't want help from the government at all. Socialism was when the people wanted "some government" involved within the businesses. In summary, the main difference is the amount of government that was allowed to take over in a business.