(A) The man was rich but not content because of his greed. He always wanted more and this greed never let him be satisfied and happy with what he had.
(B) According to the poet, Alexander pope, a happy man is that who is content to breathe his native air and has his paternal land, eats the things that he gets from his land and animals by serving them. Such person leads a healthy and peaceful life living at his own place with satisfaction.
(C) The narrator was not honest in his relation with the girl. He loved the girl for eight years but he betrayed her. He refused to marry her owing to paternal opposition.
(D) The mother advises her daughter that the circle fulfilment is always limited while unfulfilment is boundless.