According to the information presented in "edward jenner and the history of smallpox and vaccination,” which sentence summarizes the author’s use of evidence to support the claims in the passage?

the author uses mostly opinions mixed with some facts to support claims.
the author uses mostly facts mixed with some opinions to support claims.
the author uses only opinions to support claims.
the author uses only facts to support claims.

the answer is b

Which statement best evaluates the author's use of pacing in the passage? a. the author's use of pacing is not effective, because the imagery and figurative language don't adequately describe either the cheetah or the gazelle. b. the author's use of pacing is effective, because the imagery and figurative language speed up the action, making the scene come alive for the reader. c. the author's use of pacing is effective, because the long, complex sentences the reader fully understand the power and beauty of nature. d. the author's use of pacing is not effective, because the long, complex sentences distract from the sense of stress and anxiety the passage should convey.