This Spanish explorer did not explore Texas; he was famous for mapping the Texas coastline. (Alvarez De Pineda) (Francisco De Coronado) (Cabeza De Vaca) (Estevanico) (Hernan Cortez) who was it

Alonso Alvarez de Piñeda, a mariner, first sighted Corpus Christi in 1519, while mapping the Texas coastland and also visited Galveston Island. Pineda was sponsored by the governor of Jamaica, Francisco de Garay, and spent six months mapping the Gulf Coast from northwest Florida to Tampico

Explanation:

alaska is the answer to this

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.