Answer:
-considering the author's point of view
-actively questioning what you read
Step-by-step explanation:
A bias is an opinion about a certain idea in a form that is considered to be unfair. When you read something you can identify a bias by analyzing the author's tone and attitude about the subject and by evaluating the information presented, if some information is missing and if it is trying to make you believe something. According to this, the best ways to watch for bias when reading history are: considering the author's point of view and actively questioning what you read.