A makes the most sense grammatically.
I'm not so sure but I am leaning towards false than true, it says ALL, so its kind of a trick question.
Answer:
Good morning/evening ladies and gentlemen today I am here to talk about the topic people are never satisfied with what they have . They always want more . For example if I stop right now the teacher won't give me marks since she wants me to say more about the topic :-) We don't want that now soo let me continue people are never satisfied with what they have they are greedy and sometimes this greed leads to disasters .But for some others a bit greed can help them be successful.This people are very kind and they know how hard life is so they try to make it a bit easier for other people. This will lead them to even more success and in turn more people will be helped by them . But since people are greedy at one point or the other they will stop helping society.They forget where they came from and starts thinking only about themselves.This is why there are people around the world who don't get food ,water and other basic necessities.I am not telling that the rich are obliged to help the poor but the people who are really in need for help like orphans.But they don't do this because of greed.If it wasn't for greed many people would have had a better life but for many life wouldn't be so kind.So greed is a necessary evil like friction.As you need to apply lubricants to prevent friction from ruining things . You need to learn to control greed but many people don't do so because they don't want others to be as great as them, because of greed. This leads to the fact people are never satisfied with what they have and never will be .
Thank you and have a nice day.
