The third one. A person uses another's lack of knowledge as proof his argument is correct.
This may be helpful:
https://literarydevices.net/fallacy/
Osteo is relating to bones. like osteoporosis
They are: to demilitarize Antarctica, to establish it as a zone free of nuclear tests and the disposal of radioactive waste, and to ensure that it is used for peaceful purposes only; to promote international scientific cooperation in Antarctica; to set aside disputes over territorial sovereignty
She was wondering whether they've (A) completed their lifeguard training.
Answer:
Ben is Willy's adventurous and lucky older brother. Of course, he's dead, so he only appears in the play as a character in Willy's troubled imagination. Willy totally idolizes Ben because he was an adventurer who escaped the world of business and got rich quick by finding diamonds in the African jungle
Explanation: