Question : In the direct$-$current straight polarity connection method of the shielded$-$metal arc welding process, about $2/3$ of the arc energy is concentrated at the $\_\_\_\_\_\_\_\_\_\_$ welding speed.

A$.$ Electrode, which means there is less heat at the work piece, thus requiring slower

B$.$ Electrode, which means there is less heat at the work piece, thus requiring faster

C$.$ Electrode, which means there is more heat at the work piece, thus requiring slower

D$.$ Workpiece, which means there is less heat at the electrode, thus requiring slower