A stable income
A stable job
Legally owning property
Possibly a family
Good health
I would assume, the best way to measure if it's achievable would be making a graph of various ages and seeing when most people achieve these indicators and how many do it.
This is false. the busiest men do not have the best essay. That would either be discrimination or being bias.
A sounds best because the best relations for a human is risks. All humans have risks, that is what makes us human. D wouldn't make since because in order for a human to succeed they have to have risks and mistakes so that they can learn from them