Answer:Although the Keating-Owen Act was passed by Congress and signed into law by President Woodrow Wilson, the Supreme Court ruled that it was unconstitutional in Hammer v. Dagenhart 247 U.S. 251 (1918) because it overstepped the purpose of the government's powers to regulate interstate commerce.
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(1) data triangulation: the use of multiple data sources in a single study; (2) investigator triangulation: the use of multiple investigators/research- ers to study a particular phenomenon; (3) theory triangulation
Except for the king, every noble in a feudal society served as a <u>vassal </u>to a higher noble. The vassal in medieval Europe, was a man who was granted land in exchange for service and loyalty to an older man or is more important. They made a feudal contract that was an exchange of promises between lords and vassals. In feudal society was the monarch, then the powerful lords who had vassals.