The correct answer is D. Modern audiences can easily understand the themes of ambition and desire that the characters show. These are some virtues and flaws that have existed for a long time, and that will exist until the end of the time without changing - there will always be desire, and there will always be ambition. This is something all people can understand as those are some of the universal emotions - this is why these old plays are still very popular, even though Macbeth was written by Shakespeare in the 17th century.