Which statement best describes the relationship between dolphin and human brains:

Which statement best describes the relationship between dolphin and human brains:
 
  A. Dolphin and human brains could hardly be more different.
  B. Dolphin and human brains at first seem similar, but close examination reveals that humans have vastly superior intelligence.
  C. A dolphin's brain probably resembles a human brain more closely than that of any other animal.
  D. A dolphin's brain probably resembles a human brain more closely than that of any other animal, but close examination reveals that dolphins have vastly superior intelligence.