Well during the early twentieth century, food became a major cultural battleground. The influx of large numbers of immigrants from Southern and Eastern Europe Progressive Era brought new foods to the United States. Settlement house workers, and food nutritionists, and domestic scientists tried to "Americanize" immigrant diets and teach immigrant wives and mothers "American" ways of cooking and shopping. So I think the answer would be D. There were many new foods to which immigrants had to get used to.
