What is unique to the Phoenician community

What's unique about the Phoenicians community is that they were famed in Classical Greece and Rome as 'traders in purple', referring to their monopoly on the precious purple dye of the Mrex snail, used, among other things, for royal clothing, and for their spread of the alphabet, upon which all major modern alphabets are derived.

d. promised it other land

answer; the period of time known as the middle ages;