B is the only sarcastic option, and is therefore the best answer.
Gladwell’s message is a simple one: to be successful one has to have a certain level of skill or knowledge or intelligence, and one has to be presented with opportunities of which one can take advantage.
As far as I could see while reading, the passage's main purpose is to reflect upon the challenges and hardships endured by Americans under the tyrannic, British rule. I hope that helps.
The answer your looking for is B.
