Which of the following was not a characteristic of phoenician cities? a. they were located on islands. b. they had harbors on each side. c. they were built on land jutting out to the sea. d. they were surrounded by high stone walls and towers.

The correct answer is option A.  "They were located on islands".

Explanation:

Phoenicia was an ancient civilization comprised of cities located along the coast of the Mediterranean Sea, in what is now Syria, Lebanon and northern Israel. The people of Phoenicia owned large and mighty ships, serving their god of the sea Yamm. Most of the Phoenician cities were located in the coast, not were part of islands in the Mediterranean Sea.