A defendant is on trial for murder. The only evidence linking the defendant to the crime is some blood found at the scene. The lead detective testifies that an officer took a vial containing a blood sample that had been retrieved by a crime scene technician and drove off with it. The officer is now dead. Next, the prosecution presents as a witness a crime lab chemist. The chemist will testify that he took a vial of blood that contained a label identifying it as having been retrieved from the subject crime scene, and that he performed tests that established a match between that blood and a blood sample taken from the defendant.Is the testimony of the chemist admissible?A Yes, because there has been proper authentication.B Yes, because the chemist qualifies as an expert witness.C No, because there is insufficient evidence of chain of custody.D No, because he did not take the original blood sample at the scene of the crime.