Clue 1 he is the person who invented DC currents a second clue not tomis Edison
Christianity, increase of population in cities, and the Norman conquest of England in 1066 A.D..
This made it were there had to be a reason to fight i think
It wasn't to bad. So that's your answer.
C. To create a strong group to protect from outside invaders.
The purpose of the Delian League was to protect Greece from the Persians and liberate Ionia from Persian rule.