If you get your news from online sources such as blogs and message boards, what do you need to do? a. make sure all your sources are subjective. b. read primarily authors whose views match yours. c. stop spending so much time online. d. be extra careful to look for biases.

The correct answer is D.  Be extra careful to look for biases.

News from online sources such as blogs and message boards are inevitably biased since they reflect the individual authors' opinions, interpretations and points of view. Since opinions are subjective and vary from person to person, they are full of biases. Therefore, it would be wiser to obtain news from less biased sources such as national newspapers or news channels that report news as it is instead of reporting it in a way that reflects a journalists or news reporter's point of view. 

the answer is:

in the fourth paragraph. ( the paragraph that begins with “on friday of my third ”).

hope it !