In my opinion, they do not only reveal what will happen, but also manipulate events. When Macbeth approached the witches, they could have concealed the truth from him and just let the events unfold, but they didn't do it. They told him about the prophecy, thus initiating the events that soon followed. If they hadn't told him the truth, Macbeth might have never killed Banquo, Duncan, and the rest in order to become king. So yes, they manipulated events and caused a great tragedy.
B would be correct, it is the most definite answer, without any lies/gimmicks.
Answer and Explanation:
African countries have been extremely exploited and devalued by European nations and other nations considered to be world potentials. This exploitation has enabled African nations to become small, poor and often unskilled, which increases not only their problems, but also their devaluation around the world. Civilian governments have not been effective in solving these problems, which shows us that these governments are a flawed investment with no positive results, which need to be quickly changed by disciplined, rigid and imposing military governments, capable of bringing about real national changes.