According to Herodotus, which "Mede-sympathizing" Greek city-state is the least trustworthy and the most prone to cowardice? Thebes

Athens

Corinth

Thebes

Explanation:

There was a general sentiment amongst most Greeks during the second Persian invasion of Greece by King Xerxes that Thebes was a Mede-loving city-state which meant they they have pro-Persian sentiments.

This is why when a general of Xerxes' needed to retreat from Athens, he retreated to Thebes where they rested for the winter. The Greeks defeated him and entered Thebes where they killed anyone they judged to be pro-Persian.

herodotus taught this. herodotus was an ancient greek historian who was born in halicarnassus in the persian empire. he is known for having written the book the histories, a detailed record of his "inquiry" on the origins of the greco-persian wars.