The writer is considering adding the following sentence immediately after sentence 6. His argument was based on the assumption that the brontosaurus’s five sacrum bones would have fused together into the apatosaurus’s three sacrum bones with age. Should the writer make this addition?.

Which source would provide the most bias-free information about smoking and increased health risks? a) a website created by heart disease patients b) a research study conducted by the mayo clinic eliminate c) a public service message sponsored by tobacco companies d) an online question forum conducted by attorneys for cardiac specialists