Answer:
The Answer is B
Explanation:
It gave the byzantine empire access to valuable luxury goods.
The London-Smog occurs mostly in winter and is a mix of gaseous and solid aerosoles as well as natural fog. The Los-Angeles smog is dry, and formed mostly during sunny and hot weather conditions.
After the collapse it become a "democratic" nation so US saw it as less of a enemy. Also, it become a lot weaker so it wasn't as big of a rival or threat to the USA. Allowing it to trade and work together on major projects.