[Secretary Visits] Kara Wrote a Will Leaving Half of Her

[Secretary Visits] Kara wrote a will leaving half of her assets to her husband, Troy, and half to her adult daughter from a previous marriage, Madison. Kara, however, found out that Troy had been spending a lot of time with his secretary, Lucy. Angrily, Kara typed on a new piece of paper that she stapled to her will, "You skunk, Troy, you take nothing. Madison gets it all." She then signed her name. Kara then took the will to her best friend, Adriana, who signed as a witness verifying that Kara meant for Troy to take nothing. Kara was struck by lightning a few days later and died. Troy told Madison that the revision to the will meant nothing because, for one thing, it was not prepared by a lawyer.
-Regarding Troy's statement that the revision to the will meant nothing, which of the following statements is true?

A) Regardless of whether or not the change was made by a lawyer, it was ineffective because in order to revise a will, the initial will must be revoked and a completely new will written.
B) The revision to the will was ineffective because it was not done by a lawyer.
C) The revision to the will was ineffective, not because it was done by Kara, but because it improperly expressed personal opinion of an individual which by law must be absent from a will.
D) Assuming other requirements are met, the change to the will is not objectionable on the basis that it was done by Kara or on the basis that it expressed a personal opinion regarding Troy.
E) The change to the will is not objectionable so long as Madison can prove by a preponderance of the evidence that Troy was indeed having an affair with Lucy.