Consider two copper wires of equal cross-sectional area. One wire has 3 times the length of the other. How do the resistivities of these two wires compare? a. Both wires have the same resistivity; the longer wire has 3 times the resistance of the shorter wire. b. The shorter wire has 3 times the resistivity of the longer wire; both wires have the same resistance. c. The longer wire has 3 times the resistivity of the shorter wire; the longer wire has 3 times the resistance of the shorter wire. d. The longer wire has 3 times the resistivity of the shorter wire; both wires have the same resistance. e. Both wires have the same resistivity; the shorter wire has 3 times times the resistivity of the longer wire.