At Her Death Tricia Had an Adjusted Gross Estate Consisting

At her death Tricia had an adjusted gross estate consisting of $8 million of property. Which of the following is a true statement about Tricia's estate or estate tax?

A) Tricia must have a taxable estate over $8 million.
B) Tricia's taxable estate will not exceed $8 million.
C) Tricia must have a probate estate tax of zero.
D) Tricia must have a gross estate tax of zero.
E) None of the choices are necessarily true.