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

A chef is standing behind the counter with all the supplies for making a reuben sandwich. He spreads butter in a pan, then cooks the bread with the toppings as he stacks them together. he

Available choices:
[a]. tastes the sandwich as they are him piling it onto baked bread.
[b]. cuts the sandwich in half, turning the halves toward the camera as he continues talking about the finished product.
[c]. adds parsley and garlic onto the bread and puts on the sandwich.
[d]. throws their contents in the horseless washer with the waitress who rolls them out and uses them to soak in the boiling water at the sink.
[b].