What is the most logical next event?

A man is wearing protective gear. He is using a welder and creating a bright light as he works on metal. when he

Choose from:
[a]. is done, blue light fills the field.;
[b]. is done, he looks up with a surprised look on his face.;
[c]. is done, he stands up and yells from happiness.;
[d]. is done, he stops and looks at the camera, showing off the completed welding.;
[d].