Curb the power of political machines.
Answer: It enables them to express their opinions.
Explanation:
Freedom of thought is one of the fundamental human rights. It is the right of every individual that his or her opinion and speech will not be sanctioned and punished.
Freedom of thought and expression have been established in several international conventions on freedom. For a society to reach the level of modern and democratic, the cornerstone in this respect must be freedom of thought and speech.
The answer is c for what was one effect of the slave trade on africa
