Answer:
C) PURPLE DYES
Explanation:
The Phoenicians were known for their monopoly of purple dye. If you would like to know more, go to this website:
https://www.timemaps.com/civilizations/phoenicians/#:~:text=The%20Phoenicians%20were%20famed%20in,other%20things%2C%20for%20royal%20clothing.