Which european countries have the highest rate of urbanization?

In 2018,Belgium had the highest degree of urbanization among OECD countries with 98% of the population residing in urban areas

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.