In the context of criminal trials, which of the following statements is true of hearsay? a. A hearsay statement is admissible only if the original remark was made by an expert witness. b. Admitting hearsay as evidence protects witnesses' Sixth Amendment right. c. A hearsay statement is usually admissible if there seems to be little risk of a lie. d. Most states prohibit hearsay evidence when the statement contains an admission of wrongdoing.