Which of the Following Statements Concerning National Files Housed in the FBI

Which of the following statements concerning national files housed in the FBI Crime Laboratory is true?

A) The laboratory is able to determine makes but not models of automobiles involved in hit-and-run cases by analyzing and comparing small fragments of paint.
B) Hairs recovered during investigations can be identified only as to whether the source was human or animal.
C) The manufacturer of a particular piece of paper can be identified.
D) The use of files requires that a legal precedent to do so exists.