Under Common Law, Which of the Following Statements Is True

Under common law, which of the following statements is true about, John, testifying as a lay witness, offering his opinion about the defendant's demeanor at the crime scene?

A) The testimony of a lay witness could be a combination of facts and opinions.
B) A lay witness could offer an opinion once the party offering the witness laid a proper foundation for the opinion.
C) A lay witness's opinion had to have a scientific or technical basis to support the testimony.
D) A lay witness was prohibited from offering opinions.