The figure shows an electric circuit made up of a battery and a bulb. Which of the following is the correct sequence of the directions of current at X,Y and Z?

• A. X Y Z \[\uparrow \] \[\downarrow \] \[\uparrow \]      
• B. X Y Z \[\downarrow \] \[\uparrow \] \[\downarrow \]      
• C. X Y Z \[\to \] \[\leftarrow \] \[\to \]      
• D. X Y Z \[\leftarrow \] \[\to \] \[\leftarrow \]