[Will Formalities] Mark Decided He Wanted a Will

[Will Formalities] Mark decided he wanted a will. Mark contacted Anthony, a reputable attorney with an expertise in estate planning. In their initial meeting, Mark described the property he owned and how he wished it to be distributed upon his death. Mark also specified his funeral arrangements. Anthony drew up the will and provided Mark with a draft. Mark made some minor revisions, which Anthony incorporated. Mark and Anthony went over the will one last time, in the presence of Anthony's administrative assistants, Stacy and Jason. Mark was satisfied with the will and signed it. Two years later, Mark wanted to revise his will to add his new wife, Karen. The document named Karen as the primary beneficiary instead of Mark's brother, John. Mark handwrote these provisions on a thin cutting board and labeled it "codicil," signed it, and attached it to his will. Mark unexpectedly dies and Karen and John dispute who should receive the majority of Mark's assets.
-Which of the following statements is true regarding the codicil Mark drafted?

A) It has no effect because holographic codicils are not recognized.
B) It fails to meet the requirement of attestation by witnesses.
C) It meets all of the requirements for a valid codicil.
D) It fails to meet the writing requirement.
E) It fails to meet the signature requirement.