Which of the following statements is NOT mentioned about the migration to Harlem
A．Dutch was the first immigrants to Harlem.
B．In the first decade of the twentieth century, Blacks from middle and lower blocks of the West Side settled in Harlem.
C．Immigrants from the South, the Caribbean, and parts of Africa settled in Harlem as a result of the First World War.
D．Some black immigrants came to live in Harlem because it was in New York city.