How did Congress react to the Black Codes of the 1860s?

Which of these statements best describes the ambiguity in this excerpt

The california gold rush: actually had only a small impact on california’s population because its rich farmlands already attracted thousands of new settlers each year. attracted almost equal numbers of men and women. resulted in laws that discriminated against “foreign miners.” made considerable wealth for average miners because gold mining demanded no real investment of capital. hurt the development of san francisco because gold discoveries shifted interest to areas outside of town.

How do you imagine life would be without the invention of the typewriter? would computers have been invented?