Question: Why might it be most reasonable to state that groups may be the most useful invention of humanity? Question options: 1) Because groups give us a mirror against which to assess our own status in society. 2) Because groups allow us to create a social hierarchy and establish dominance over others. 3) Because groups allow us to reach goals that could not be accomplished individually. 4) Because groups provide opportunities to compete and win, and therefore boost self-esteem.