What is the estimated average drift speed of conduction electrons in a copper wire with a cross-sectional area of 2.5 x 10^-7 m², carrying a current of 2.7 A?

a) 1.5 x 10^-4 m/s
b) 3.0 x 10^-4 m/s
c) 4.5 x 10^-4 m/s
d) 6.0 x 10^-4 m/s