Which, If Any, of the Following Items Characterizes § 6166

Which, if any, of the following items characterizes § 6166 (i.e., extension of estate tax payments relative to an interest in a closely held business) ?

A) No estate tax due need be paid for the first 5 years.
B) No interest needs to be paid for the first 5 years.
C) In satisfying the more-than-35% test for qualification, all interests in closely held businesses can be aggregated.
D) The 2% rate of interest applies to the total amount of estate tax value.
E) None of the above.