How did the attitude towards foreigners and trade routes change during the Tang Dynasty
?

They're less welcomed

Explanation:

At that time, many traders from western nations (most notably Britain) came to China and sold various type of goods. Opium is one of the most popular product in Chinese market at that time.

This created massive addiction problems which destroy China's economic productivity. The western merchants on the other hand, accumulated large amount of wealth from this trades. As a result, a lot of hostilities toward foreigners started to build up during the Tang Dynasty.

d.

thist title points out that you are explaining the nature of the u.s. government. it is the most specific. a representative government consists of a government where decisions are taken according to a voting system. the most essential aspect of a representative government is found in the different structures where voting rights are granted to different groups of people. for example, voting for governor, mayor, president, local police chief etc.