Correct. The answer is c. The details of the products available in various ports, the attitude of the natives to strangers, and the conditions of the ports themselves would all have been useful to Hellenistic merchants.

Incorrect. The answer is c. The details of the products available in various ports, the attitude of the natives to strangers, and the conditions of the ports themselves would all have been useful to Hellenistic merchants.

Correct. The answer is a. The detailed knowledge the author had of ports in all of these regions suggests the existence of an international trade network.

Incorrect. The answer is a. The detailed knowledge the author had of ports in all of these regions suggests the existence of an international trade network.