The pictures labeled i and ii show fossils from a sediment core collected from the floor of the atlantic ocean, east of south carolina. the sediment has not been disturbed by landslides or mountain building or other processes. the pictures were taken by brian huber, of the smithsonian institution, using a scanning electron microscope. the two samples in the sediment core were separated by the unique layer marking the extinction that killed the dinosaurs. which is correct? a. ii is older than the unique layer, and thus sat above the unique layer in the sediment on the sea floor. b.i is older than the unique layer, and thus was bathed in diet pepsi on the sea floor. c.ii is older than the unique layer, and thus sat below the unique layer in the sediment on the sea floor. d. i is older than the unique layer, and thus sat below the unique layer in the sediment on the sea floor.