What strategies did north and south employ?

B. Human beings are a danger to the planet Earth; accordingly, any inhabitants of other planets have good reason to be unwelcoming towards us.

F. Despite the harm we have done to the environment, humans do have altruistic impulses that would facilitate increased efforts at environmental conservation.

Explanation:

These are the two statements that best express the ideas of the text "Choosing a warning label for human DNA." In this text, the author engages in an exercise in which he imagines how a "label" for human DNA might look. He argues that we would most likely have to warn beings from outer space about the danger of creating humans, as we are extremely destructive. However, the author argues that, by taking care of the environment, we might be able to save this planet and eliminate our need to colonize another one.