In Regard to the Idea That Humans All Are Connected

In regard to the idea that humans all are connected, it is the case that:

A) the rich and the poor live in totally separate worlds.
B) what one individual does in his or her own home has no consequences beyond his or her home.
C) an action in one part of the global system has effects elsewhere in the global system too.
D) people living now in different nations share no common ancestor.
E) a small change in, say, how we produce our food, has no chance to make a difference in the big scheme of things.