If we didn't have communication we probably would never have reached this point in civilization
Because he was friends with one of them
Answer;
-The seclusion of the setting contributes to a feeling of isolation.
Explanation;
In "Dover Beach" by Matthew Arnold, the place affects the theme in that the seclusion of the setting contributes to a feeling of isolation.
-Through out the poem Arnold is lamenting the loss of faith or culture in his society and painting a picture of a world that, as a result of this loss of faith, is full of cruelty, uncertainty and violence.
I think you should combine c and d if possible, if not then a is the best answer in my opinion.