Answer:
B.
Demosthenes warns Athenians not to be naïve and to be prepared for any circumstances.
Step-by-step explanation:
The statement that best describes Demosthenes's claim is option B where he warned the people of Athens not to be lulled into a false sense of security and be prepared for anything.
This was summed up in the closing statement from the excerpt where he said, "It is folly, and it is cowardice, to cherish hopes like these, to give way to evil counsels, to refuse to do anything that you should do, to listen to the advocates of the enemy’s cause, and to fancy that you dwell in so great a city that, whatever happens, you will not suffer any harm."