Question: Immigrant farm workers during the Dirty Thirties used a route that connected what states?
Sentence (from "U.S. Route 99"): U.S. Route 99 (US 99) was a main north–south United States Numbered Highway on the West Coast of the United States until 1964, running from Calexico, California, on the US–Mexico border to Blaine, Washington, on the U.S.-Canada border.
Relevant evidence: Yes