Task: Question Answering
Input (English): Charles Darwin made a number of observations and inferences during his travels. He studied island finches during a long period of time. Which statement is an inference?  
 (A) Individual birds have different colored feathers. (B) Island finches have a large number of offspring. (C) Individual birds of an island finch species have many differences. (D) Island finches share a common ancestry with mainland finch species.
Output (English): D