This advancement would be crop growing.
When people first started growing crops, this enabled them to stop living nomadic lives, where they had to go from food source to food source, but stay at one location that enable them to grow crops which they needed to make food out of. Eventually, this had led to the formation of villages and ever bigger urban areas :)
Well, with better meds, we are able to cure bad diseases that people may have, for technology, we can send communication from a long distance for help.
Roman people basically copied greek gods. According to Greek mythology, the greek gods lived on mount olympus. For example, greek god ares in roman was called mars
In simple terms, cultural diffusion is when different cultural beliefs and activities join together into one community. It creates a broaden horizon of new ideas.
A would be incorrect, since cultural diffusion is the opposite, as it collides and opens doors to other cultures
B would be incorrect as it opens up political ideas and religious cultural ideas
D is possible, however, the cultural diffusion focuses on inside the community
Therefore, C would be your best answer. Hope this helped!