Why did opec hit america with an oil embargo?

What motivated germany to make an alliance with austria-hungary?   a.  fear of aggression from the united states      b.  fear of aggression from france      c.  the desire to invade russia      d.  fear of aggression from england

6. how did trade with the venetians contribute to the fall of the byzantine empire?

Mississippi, florida, alabama, georgia, louisiana, and texas all seceded from the union. true or false ?