I need help really bad please

Which statement best completes the diagram?
Cause
Effect
?
More Europeans move to the
United States in the 1800s.
A. German potato crops are struck by disease
B. European cities go through industrialization.
C. American nativists welcome more immigrants.
O D. The Irish suffer from starvation.

I need help really bad please Which statement best completes the diagram Cause Effect More Europeans move to the United States in the 1800s A German potato crop class=