A student writes an essay about the causes of global warming. Several of the
sources she cites to support her argument are written by Arnie Wallace. How
can the reader best determine whether these sources are credible?
A. Research Wallace to see if he is an authority on global warming.
B. See if there is a Wikipedia entry about Arnie Wallace.
C. Read additional resources about global warming.
O D. Look online for blogs that also cite Wallace’s writing.