A copper and a steel wire of the same diameter are connected end to end. A deforming force \(F\) is applied to this composite wire which causes a total elongation of \(1\) cm. The two wires will have:
(a) the same stress (b) different stress
(c) the same strain (d) different strain

Choose the correct option:
1. (a), (b) 2. (a), (d)
3. (b), (c) 4. (c), (d)