18.D
19.A
20.C
21.B
theses are going to be your answers
B, D, and E are all push factors, the rest are pull factors
B)after peak oil,oil production and supply will decrease,but demand will increase
If Jen can remember the first and last three items when she gets there, but she is unable to remember the four in the middle, this U-shaped pattern of recall is called the serial position effect.
Hilary Clinton and Sarah Palin
