Sally Winchell Worked as an Administrative Assistant for Her Boss

Sally Winchell worked as an administrative assistant for her boss and had observed him sign his signature on documents for a period in excess of five years. In order to authenticate that contained allegedly the boss' signature, the prosecutor wanted Sally Winchell to offer an opinion considering whether the given signature was that of her boss. Under the circumstances, Sally Winchell:

A) cannot testify in court considering the identity of the signature because that activity constitutes an opinion for which an expert witness is required.
B) will not be permitted to offer an opinion concerning the genuine quality of her boss' signature because she has not observed her boss making the signature for a sufficient length of time.
C) should be allowed by the trial judge to offer her personal opinion concerning the genuine quality of the signature, which was allegedly made by her boss, because she has a basis for offering her opinion.
D) should be permitted to offer her personal opinion about her boss' signature because both lay and expert witnesses are always qualified to offer opinions concerning handwriting of other persons.