Answer:
Sources that have an obvious bias should be avoided when doing research.
Explanation:
If there's bias, then all the facts might not be there.
this the answer of your question
Number one, where are the sentences? Number two, where is the previous question? Number three, the correct term is 'which' not 'witch'. I will help you, but only if you correct the problems I have pointed about above. Thank you.
Cool? Not really sure what the question here is.