Which of the following happened first?

a. Peasant Crusaders attacked Jews in Germany.

b. Saladin successfully defended Jerusalem against King Richard I.

c. Crusaders attacked Constantinople.

d. Pope Urban II called on Christians to fight the Muslim Turks.

THE ANSWER IS "D"

i think the answer is c, rivers.

explanation:

sometimes, borders fall along natural boundaries like rivers or mountain ranges. for example, the boundary between france and spain follows the crest of the pyrenees mountains. for part of its length, the boundary between the united states and mexico follows a river called the rio grande. the borders of four countries divide africa’s lake chad: niger, chad, cameroon, and nigeria.

a big wall across the mexican border so no drugs, terrorist, or illegal immigrants can come through : )    

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."

athena gives perseus a mirror sp he won't directly look back at her.