How did the marriage of princess Isabella of Castile and prince Ferdinand of Aragon help to create the kingdom ( country) of Spain ? - unified the two largest kingdoms into one

- used their unified strength and claims Muslim land in Granada

- create a strong Christian based kingdom

- all of the above

Which of the following statements is true about germany's use of u-boats?

Was the civil war inevitable? could anything have been done through compromise to stop it, or did it have to happen?

Characteristics of what type of economic system are being described below? 1.economy in which some/all of the basic economic questions answered by central authority 2.trade generally limited to what is produced through the influence of the government a.command economies. b.market economies. c.traditional economies.