Yo tu el ella nosotros ustedes ellos ellas en kaqchikel

ahaha 8

my answer has to be at least 20 characters so here are the rest of the characters lol

d. new methods of assembly are introduced.

explanation:

this allows for the goods to be made on a larger scale. not faster because now it is shown to be made better, hence the greater productivity in the question. it is calling for something new to be introduced.