Multi-choice problem: Continue writing the next sentence in this paragraph:

A woman is shown putting a long metal piece into a large machinery and the words "today's topic: welding" appears on the screen followed by a person wearing a mask and welding with a torch. a woman

a). is now standing at a machine and she is grabbing various metal objects and putting them into a machine that welds them together.;
b). puts a metal rod into a welded metal one and the report is shown on the screen.;
c). runs around an area welding the metal piece making several designs on the metal piece as well as talking to the camera.;
d). is shown welding with another woman under a large metal roof and the same body of metal is shown again until what is inside of it becomes hazy.;
a).