God, if I could choose, I would say none. All of these lead to inequality (because circumstances vary between many individuals) but I believe prestige should hold the most weight in determining social class. Prestige (which is respect, recognition, or regard) is based on many criteria, including wealth, family background, fame, leadership, power, occupation, and accomplishments. Leadership, power, and accomplishments can both be achieved by any individual with hard work. This is still an unfair balance (gender inequality, racial/ethnical inequality/racism) because of individual factors, it still leaves hope for some people to rise the social ladder.
In this case, Emma was not part of the market for Prodigy Placement, and her parents were part of the market because Emma lacked the desire.
The market of Prodigy Placement is specifically aimed for parents who want to send their children to the school since students at the school are considered in the top 1% of their age group in terms of IQ scores and aptitude.
Collision and uplift movement
Corresponding to the collision between two lithospheric plates, the layers of elastic rocks give rise to mountain ranges, at various times volcanic, with this formation characteristic we have the Andes and Himalayas.
