How Did America See the Chinese During the 19th Century

How did America see the Chinese during the 19th century?

A) The Chinese were defined mostly in negative stereotypes and only in positive terms when it came to their food in restaurants.
B) The Chinese were defined in negative stereotypes during economic hard times and in very positive terms when their labor was needed for building the railroad.
C) When the Chinese first arrived in this country, they worked very hard, and other people recognized their excellent work habits. By the late 19th century, it led to greater advances in industry and trade and became known as the model minority.
D) During the gold rush days, there was little prejudice against the Chinese because it was each man for himself.