Hi. It looks like there are missing details such as the choices in your item. I went ahead and looked for similar questions to get the choices. The two items that do not illustrate why Germans immigrated to America are:
1) economic taxation and seizure of property by the warring factions of being forbidden to ship their dairy products, linens and woolens to English markets.
2) forbidden to ship their dairy products, linens, and woolens to English markets and continual warfare among the many German states.
The answer would be “that ‘separate but equal’ was a valid legal doctrine”. This is because this ruling upheld the constitutionality of segregation under the premise that as long as things were “equal” for African Americans then they could be separate.