¿cual fue el origen de la escritura alfabetica y quienes lo usan actualmente?

Which is the best example of a primary source ducument useful in the study of history ?

Which of the following is an example of one of the successes of the marshall plan? a. a few eastern european countries decided to turn to democracy. b. western european economies were stronger than they had been before wwii. c. borders between western and eastern european countries shifted. d. eastern european countries eventually took part in the plan. ( answer in the format above so i can understand)

Thomas jefferson was the president of the united states. first second third fourth