A)Fossil layers below the K-Pg boundary are younger than fossil layers above the K-Pg boundary.
B) Non-avian dinosaur fossils are only found below the K-Pg boundary.
" C) Mammal fossils are not found below the K-Pg boundary as they appeared after the event.
D) Fossil layers containing dinosaurs and mammals are below the K-Pg boundary.
E) Fossil layers below the K-Pg boundary are older than fossil layers above the K-Ps boundary