Settlor establishes a revocable trust for the benefit of his two children. He funds it with his life savings of $10,000, and names Friend as trustee. Testator, Settlor's wealthy uncle, hears of the trust established by Settlor and executes a will leaving all of his estate to the revocable trust established by Settlor. Testator then informs Settlor of the existence of the will. Knowing that Testator's estate is sizeable, Settlor amends the trust to give new instructions to Friend as to how he is to administer the trust in light of the upcoming additional gift from Testator's will. Which of the following principles can be used to validate Testator's will? Question 6 options: a) Incorporation by reference. b) Acts of independent significance. c) The Uniform Testamentary Additions to Trusts Act. d) Any one of the above