If layer G formed just after the dinosaurs became extinct, then when was layer F formed?

A.
Mesozoic era

B.
Cenozoic era

C.
Precambrian era

D.
Paleozoic era

Question

If layer G formed just after the dinosaurs became extinct, then when was layer F formed?		
  

 
 A.
Mesozoic era
 
 B.
Cenozoic era
 
 C.
Precambrian era
 
 D.
Paleozoic era

anonymous · Answer

same pic

thadyoung · Answer

idk this one 
@Destinymasha

thadyoung · Answer

http://static.k12.com/calms_media/media/922500_923000/922534/2/a0aa093b9072d57a0d95ed0ae89802dd35f0638e/MS2_ERT_03_09_rock_layers.jpg

tori040403 · Answer

its A

anonymous · Answer

for those who aren't sure, Tori040403 is correct.

anonymous · Answer

phew! (Im tori, this is my back up account because my other one was hacked)

anonymous · Answer

who hacked it? dang must be hard for u. because u seem nice and i remember this guy arguing with me in this web and it seemed like your account and he had the wrong answers too. what a jerk! oh did u report about it? @K12IsAwesome