Question

review the claim and the two pieces of evidence. chewing gum can improve our alertness and lower our stress level. evidence a: during a class discussion, a student shared that he chewed gum throughout a recent chemistry test because he heard it would help him stay calm and alert. he believed that he did very well on the test as a result. evidence b: in a study of forty participants, those who chewed gum while performing stressful tasks had lower levels of anxiety and higher levels of alertness than those not chewing gum. why is evidence b stronger than evidence a? evidence a does not directly support the claim. it does not discuss whether chewing gum increases alertness and lowers stress. evidence a does not come from a credible source. it is based on the opinion of one person who is not an expert and has not done research.

Explanation:

Evidence A is anecdotal, based on one - student's self - reported experience. Evidence B is from a study with forty participants, which provides more objective and generalizable data. A single - person opinion is less reliable than results from a proper study.

Answer:

Evidence B is stronger because it comes from a study with multiple participants, providing more objective and generalizable data compared to the anecdotal Evidence A which is based on one person's opinion.