The principle states that people categorize others on the basis of what appears initially prominent and obvious about them.

The answer is "salience principle".

Salience principle, which expresses that we sort individuals based on what shows up at first noticeable and self-evident—that is, remarkable—about them. Skin shading is a remarkable trademark; it is one of the main things that we see about somebody. Since skin shading is so self-evident, it turns into a reason for stereotyping. 

It could be anything, recent improvements in technology/telecommunication/internet have increased the pace of globalization.generally, it has something to do with technology. globalization means that people around the world are brought together through technology which speeds things up. so maybe some of those options could be correct. : )