Sophia executes a will in 1990, naming her nephew Porter as the sole beneficiary. In 1999 she executes another will, changing the beneficiary to her niece Allison, but she does not state in the 1999 will that she is revoking the earlier will. On Sophia's death:

A) Porter inherits Sophia's estate according to the 1990 will.
B) Allison inherits Sophia's estate according to the 1999 will.
C) Both Porter and Allison inherit Sophia's estate.
D) Sophia's estate goes to the state since there's ambiguity in the wills.