The Silk Road is trading network of many roads who was growing wealthy as middlemen in the vast trade network - a feudalism , b culture diffusion , c manorialism or d : serfdom

B culture diffusion

Explanation:

The vast trade networks of the Silk Roads carried more than just merchandise and precious commodities. In fact, the constant movement and mixing of populations brought about the widespread transmission of knowledge, ideas, cultures and beliefs, which had a profound impact on the history and civilizations of the Eurasian peoples.

1 > george s. boutwell

2 > general ulysses s. grant

3 > james a. garfeild

4 > adolph e. borie