The defining moment in Greek history is the Persian Wars.
Hope this helps !
Photon
What it means is that he wouldn't have been able to get where he got if it hadn't been for the scientific achievements of his predecessors. If it hadn't been for these "giants" that enabled him to see so far, he wouldn't have been able to make all the discoveries that he did. For those coming after him, he was a giant that enabled them, and so laws and theories and scientific knowledge always increases based on the knowledge before it.
Answer:
A) The young couple's cruelty has shattered Miss Brill's happy delusions about her significance in the world.
C) Miss Brill is confronted with the painful reality of the way she is perceived in society: as old and irrelevant.
Explanation:
The young couple's terrible behaviors have broken Miss Brill's bright ideas about her importance, and she feels a deep loss. The young couple's actions have shown Miss Brill that she is not as significant to others as she thought. Miss Brill learns that people see her as elderly and unimportant. The young couple she was with was rude and didn't care about her. She felt underappreciated.
The segregation and the unfairness and the last one I don't know I'm sorry I hope this helps :)