The approximation of the derivative taken by the Crank-Nicolson scheme is the same as the __________ of spatial derivative.

second order forward difference approximation

backward difference approximation

forward difference approximation

central difference approximation

The approximation of the derivative taken by the Crank-Nicolson scheme

1.	The approximation of the derivative taken by the Crank-Nicolson scheme is the same as the __________ of spatial derivative.
A.	second order forward difference approximation
B.	backward difference approximation
C.	forward difference approximation
D.	central difference approximation
Answer» E.