Which of these caused americans to move to the west in the mid-1800s a. the invention of the cotton gin. b. the development of the steamboat. c. the invention of the telegraph. d. the discovery of gold in northern california

C.

Explanation:

Because the US has a system of citizenship by being born in the United States, I'll go down the list of WHY it is C. Nationality of parents doesn't matter when it comes to citizenship by birth.

A) Franco was born in the US, thus making him a US citizen.

B) Again, Born in the US.

C) Contrary to common belief, US military bases aren't considered US soil, thus likely making her a citizen of whatever nation she was born in. (Or she would get naturalized at the nearest US Embassy.)

D) Born on the Texas side of the border. Again. US side of the border.