Sam Spade, Esq. is out of the office when his staff is working on motion papers that need to be served. Sam tells his paralegal to use his signature stamp to "sign" his name to the memorandum. Is this acceptable? A) no, because anything that requires an attorney's signature must be signed by the attorney B) yes, because a signature stamp always is an acceptable replacement for an original signature C) yes, because the attorney gave the paralegal direct instructions to use the stamp OD) yes, because papers submitted to the court do not need to be signed by the attorney