What are Advantages and disadvantages of the sources of history?

Were Aurangzeb's wrong policies the only reason for the decline of the Mughal empire? How does the Louisiana purchase relate to the war of 1812? What team does Jon Lester play for? Do samurai have a religion? Where did the viking mostly live on? How many underground railroad quilts are there? Who was the teacher who set up a school where Jewish scholars could study which helped preserve Jewish traditions? Did Wilt Chamberlain have a wife or girlfriend? In 16th century German what is a Kartäuserprior? How many people sailed with Columbus? Why is Alexander the Great such a big deal? What was the social life for people living in the New England Colonies? How long is us navy bootcamp? What does scoreless tiemean? What is the ethnic origin of the name Koch? Past tense of move? How does the size of the northwest coast culture region compare to the other three cultural regions? Who becomes the new vice president if both the current president and current vice president die in office? What did it take to be a successful chariot racer? How does brutus explain his motivation for spurning at Caesar in his solilguy?