system
A chat on subreddit /r/wallstreetbets
human
An odd way to frame how the tried to cheat the test.
gpt
The test requirements are absolutely brutal though. 

If you want to frame it positively you could say the US aims to reduce smog in their car dominant cities.

If you want to frame it negatively you could say the US wants less competition in the automotive industry (Diesel technology is dominated by european companies)