Answer :
"Immigrants primarily came from Ireland and Germany" is the one among the following choices given in the question that is a true description of immigrants in the mid-1800s. The correct option among all the options that are given in the question is option "D" or the last option. I hope the answer came to your help.
The correct option is D. Immigrants primarily came from Ireland and Germany in the mid 1800s.
Between 1820 and 1860 a wide majority of immigrants came from northern and western Europe. The potato famine in Ireland which uccured from 1845 to 1847 resulted in the immigration of a large numbers to the United States. Furthermore, the unsuccessful 1848 Revolution in Germany led to a considerable emigration to the United States.