What was one difference between “old” immigrants and “new” immigrants in the 1800s a. "old” immigrants were protestants and jews. “new” immigrants were catholics and jews. b. “old” immigrants settled among the native population. “new” immigrants formed their own neighborhoods. c. “old” immigrants were welcomed by the native population. “new” immigrants were met with hostility. d. “old” immigrants often had property and skills. “new” immigrants tended to be unskilled workers.