Knowledgeable: Full of knowledge, smart.
logos is writing that appeals to LOGIC, ethos appeals to ethics (what someone believes is morally right, etc), and pathos appeals to EMOTION.
logos and ethos are easy to remeber since LOgos/LOgic and ETHos/ETHics :p
Cyclops is motivated to do this because Odysseus tricked him and humiliated him, and even had the hubris in the end to mess with him about it. Poseidon is the Cyclops' father so naturally the Cyclops wants help and Poseidon can do it because Odysseus is traveling by sea.
The answer is D mixing and matching info
A) The city has many other cities and towns under its sway. This is the only answer in which there is nothing to argue about, all other choices you could provide something to contrary of the statement.