Three straight, identical wire segments—labeled A, B, and C—lie along the x-axis. In each segment the electron drift directions are as follows:
• Segment A: electrons drift to the right ( +x direction ).
• Segment B: electrons drift to the left ( −x direction ).
• Segment C: electrons drift to the left ( −x direction ).
Which segment or segments carry conventional current in the +x direction?
a) Segments A and B
b) Segments B and C
c) Segment A only
d) Segment B only