Question

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. look online for blogs that also cite wallaces writing. b. read additional resources about global warming. c. see if there is a wikipedia entry about arnie wallace. d. research wallace to see if he is an authority on global warming.

Explanation:

To assess the credibility of sources by a specific author on global warming, the key is to verify the author's expertise in that specific field. Blogs (Option A) are not reliable indicators of credibility. Reading other global warming resources (Option B) does not address the credibility of Wallace's work specifically. A Wikipedia entry (Option C) may not exist or be comprehensive. Researching if Wallace is an authority on global warming directly evaluates his qualifications to write credibly on the topic.

Answer:

D. Research Wallace to see if he is an authority on global warming.