Two cylindrical resistors made of the same material, A and B, have the same length. The cross-sectional area of resistor A is twice as large as the cross-sectional area of resistor B. How do their resistances compare?
a) The resistance of A is half the resistance of B.
b) The resistance of A is equal to the resistance of B.
c) The resistance of A is double the resistance of B.
d) The resistance of A is quadruple the resistance of B.