When you come across a source that you think may be biased, you should
a. not use the source at all.
b. accept the source as long as you agree with it.
c. check the source's credibility by using other sources.
d. use the source as long as you cite it in your work.

If you find a source to be biased and unreliable, you must check the credibility of the source, hence the answer is C. If you are trying to argue in favor of a certain viewpoint on an issue, a credible scientific source or news source must be used. Check who the authors and publishers are and what entities are funding the research.

Prewriting: this stage of the writing process involve gathering and selecting ideas; teachers can students in several ways: creating lists, researching, brainstorming,reading to discover more about the author's style, talking, collecting memorabilia or clips from other texts, and free-writingdrafting: in this stage, students begin writing, connecting, and developing ideasrevising: this is the stage of writing that involves rewriting or "re-seeing; " emphasis is place on examining sentence structure, word choice, voice, and organization of the pieceediting: this stage involves checking for style and conventions--spelling, grammar, usage, and punctuationpublishing: the "going public" stage of writingevaluating: in this stage, the writer looks back at his/her work and self-evaluates, and the audience evaluates the effectiveness of the writingwriting activities : personal writing, workplace writing, subject writing, creative writing, persuasive writing, and scholarly writingpeer review: acting a referee; evaluating a colleague's work professionally