The cultural trait that is most likely responsible for the difference in workweek length between the U.S. and the Netherlands in 2020 is:
The U.S. culture prioritizes capitalism, while the Netherlands’ culture prioritizes health and welfare.
This option reflects the differing societal values regarding work-life balance and labor practices in the two countries, with the U.S. often emphasizing work and productivity and the Netherlands placing a greater emphasis on health and well-being.