challenge: What was the outcome of Eugene Schieffelin's 1890 release of European starlings in Central Park?
  
  A. The starlings were quickly eradicated by local predators
  B. The starlings caused significant damage to the park's ecosystem
  C. The starlings successfully nested, marking the first observed instance in North America
  D. The starlings failed to adapt to the new environment and died off
  Answer: 