How did the theory of social darwinism justify european imperialism during the 19th century ?

It suggested that powerful countries had the right to rule over the weaker countries. (APEX)

answer; ///i believe that the correct answer is (b); ///the candidate must be a native born american citzen;

zheng he was a chinese explorer who lead seven great voyages on behalf of the chinese emperor. his seven total voyages were diplomatic, military, and trading ventures, and lasted from 1405 – 1433. however, most historians agree their main purpose was to promote the glory of ming dynasty china.

explanation: