(C) Only I, III and IV are correct.
Poverty/hunger, widespread diseases, and religious conflicts/persecution drove European migration to America. Slaves were brought from Africa to America, not a reason for European migration.
The key is to identify why Europeans migrated to America. Slave trade (option II) was movement of Africans to America forcibly, not a reason Europeans migrated. Options I, III, and IV — poverty, disease-driven desperation, and religious persecution — are the historically accepted push factors for European migration. Eliminate II to get option (C).