Answer:
Option: D. 1890 was the most recent census available when the act was passed in 1924.
Step-by-step explanation:
Johnson-Reed Act is also called the Immigration Act of 1924. Immigration Act of 1924 used the national census of 1890 as its basis for managing quotas. The 1890 census was the only available data for deciding how many immigrants to admit. It reduced the percentage of immigration up to two per cent.