At his death George had a probate estate consisting of $4 million of property. Which of the following is a true statement about George's estate or estate tax?

		George must have an adjusted gross estate of at least $4 million.
		George must have a taxable estate of at least $4 million.
		George must have a gross estate of at least $4 million.
		George must have an estate tax base (cumulative taxable transfers) of at least $4 million.
		None of the choices are necessarily true.