PLEASE QUICK! 20POINTS list at least three ways the columbia and the dams on the river help the people of washington

this only says nine points tho not 20

1. It delayed the British from sneaking over to attack, 2. it helped Washington cross without any loose debris hitting, and 3. it helped him trap his enemies.

Explanation:

answer; /// i believe that the correct answer is (b)///they gained vast amounts of

answer; /// i believe the three where,tutankhamun,hatshepsut and , im not sure,but maybe (ramses the great)