When the magnetic layers are aligned in the same direction, electrons originatingin one layer may pass relatively _ _ _ _ _ through the other layers

When the magnetic layers are aligned in the same direction, electrons

1.	When the magnetic layers are aligned in the same direction, electrons originatingin one layer may pass relatively _ _ _ _ _ through the other layers
A.	Freely
B.	Blocked
C.	rest on
D.	All the above
Answer» B. Blocked