There has been a lot of concern about the sea level rising, and considering that big proportion of the world's population lives in the coastal areas that are vulnerable to the sea level rise, there's every reason for concerns. According to the projections that NOAA has been making for the future rise of the sea level, there's multiple suggestions, and the variation in increase of the sea level can be anywhere from 0.2 meters to 2 meters by the end of the year 2100.
The answer is D. The question asks how different cultures influenced each other so that rules out options A & B. Option C is about the environment being destroyed, and that really has nothing to do with foreign influence.
