Which statement best contrasts the reliability of the physician's comment with the entry from the natural cures" encyclopedia?
a. the “natural cures” encyclopedia appears less reliable because the author fails to explain how echinacea is beneficial
b. the "natural cures" encyclopedia appears more reliable because the author provides specific data to support the claims.
c. the physician's comment appears less reliable because the author fails to provide a clear argument
d. the physician's comment appears more reliable because the author provides evidence about the possible side effects of using echinacea.