What can you infer from the sentence “Tony did not begin on the bottom rung of the ladder. He began in the basement.”?

A、Tony didn’t have a ladder in his basement.;
B、Tony had a basement and he began his American dream in it.;
C、Tony lived in a basement when he arrived in America.;
D、Tony’s starting point was lower than ordinary people and he built up from nothing to seek his American Dream.