A Copper Wire of Length L and Radius B Is

A copper wire of length L and radius b is attached to another copper wire of length L and radius 2b,forming one long wire of length 2L.This long wire is attached to a battery,and a current is flowing through it.Relative to the electric field within the wire of radius b,the magnitude of the electric field within the wire of radius 2b is

A) four times weaker.
B) four times stronger.
C) two times weaker.
D) two times stronger.
E) equal.