When welding using the shielded metal arc welding (SMAW) process, which of the following best...

A lighter density in the center of the width of the weld image, either extended along the weld or in isolated circular drops.

An irregular darker density near the center of the width of the weld image along the edge of the root pass image.

An abrupt density change across the width of the weld image with a straight longitudinal darker density line at the center of the width of the weld image along the edge of the density change.

A localized darker density with fuzzy edges in the center of the width of the weld image.