Evidence Demonstrating That Meteor Crater,Arizona,formed by Meteorite Impact Includes All

Evidence demonstrating that Meteor crater,Arizona,formed by meteorite impact includes all but which of the following?

A) The crater is steep-sided and closed.
B) The rim of surrounding rock was created by uplifting the horizontal sedimentary-rock layers of the region and tilting them away from the crater.
C) Little hills of rock outside the crater rim are inverted piles of the rock sequence exposed in the crater walls.
D) Huge blocks of limestone are strewn around outside the crater.
E) Numerous pieces of iron-rich meteorite with a combined weight of 30 tonnes were found in the area