Here’s the determination for each reason for immigration:
-
Work in California goldfields: Chinese
(This reason primarily applied to Chinese immigrants who came during the Gold Rush.) -
Future economic prosperity: Both
(Both Irish and Chinese immigrants were seeking better economic opportunities.) -
Widespread famine due to the loss of a staple crop: Irish
(This specifically refers to the Great Famine in Ireland that drove many Irish to emigrate.)
So the answers would be:
- Work in California goldfields: Chinese
- Future economic prosperity: Both
- Widespread famine due to the loss of a staple crop: Irish