One of the things that sets culture apart, and is one of its major advantages, is ____.

One of the things that sets culture apart, and is one of its major advantages, is ____.
 
  a. progressthe ability to store and build upon the knowledge and achievements of previous generations
  b. communicationthe ability to convey thoughts and preferences, even if just in one-word utterances or grunts
  c. coordinationthe ability for organisms to act together in a unified, organized fashion
  d. the ability for organisms to engage in mutually beneficial actionseven if these actions are just between two relatives of the same species