Defendant is on trial for participating in a drug sale. The prosecution calls Officer Jones, an undercover officer, to testify that, when Drug Kingpin Adam sold the drugs to Officer Jones, Adam introduced Defendant to Officer Jones as "my partner in this" and Defendant shook hands with Officer Jones but said nothing. Officer Jones' testimony is Group of answer choices

a.inadmissible, because there is no evidence that Seller was authorized to speak for Defendant. b.inadmissible, because the statement of Seller is hearsay not within any exception.

c. admissible as a statement against Defendant's penal interest.

d. admissible as Defendant's adoption of Seller's statement