What factors led many Europeans to look to underpopulated areas in the world to offer opportunities for immigration in the late 19th century and early 20th centuries?

The Mississippi Black Code of 1865 was concerned with 

Which of the following was an African American from the North, a former Union soldier, and served as lieutenant governor of Louisiana during Reconstruction?

Juneteenth is

Which of the following is a land-grant college that specializes in scientific agriculture?  Congress established it and other colleges under the Morrill Land Grant Act.  

Selecciona la opción correcta de los verbos.Si yo traigo un mapa ___________ el castillo.

Choose the correct form of the present subjunctive or indicative to complete the sentence.Llamaremos a Paco para que _____ lo que pasa.

Choose the correct form of the present subjunctive or indicative to complete the sentence.No me gusta que tú ____________ así.

Choose the correct form of the present subjunctive or indicative to complete the sentence.No pagaré el ordenador hasta que __________.

Selecciona la opción correcta de los verbos.Los niños estudiaron antes de que __________ sus amigos.