Why might all biographies be biased or unbalanced despite who writes them

Karen often finds that tasks come up unexpectedly during her day, and she has trouble figuring out how to rearrange her schedule because she changes it daily.  what should karen do to prevent these unexpected tasks from disrupting her day

Which would be the most credible source for researching the effects of smoking? letter from your grandfather web page about someone’s lung cancer report prepared by a tobacco company research article in a scientific journal

"endangered dreams: the great depression in california: " which word best summarizes the author's description of the pea pickers camp?