How was Rockefeller able to build his monopoly across the oil industry?

Need on these last 2 questions on my social studies homework 5 and 6 then i’m done with the homework

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

Which is not a nation of southeast asia? .