I believe that b is the answer
Hi! The paragraph says nothing about technology and the most likely answer is C. Because the paragraph is referring to a new school, therefore she cannot have a correct observation.
I hope this helps!
Between 1870 and 1900, the largest number of immigrants continued to come from northern and western Europe including Great Britain, Ireland, and Scandinavia. But "new" immigrants from southern and eastern Europe were becoming one of the most important forces in American life. More controversial, and much more limited, was immigration from Asia and Latin America.