In 1858, Darwin received a letter from Alfred Russel Wallace describing a theory nearly identical to his theory of natural selection. How did Darwin respond?

• A. He ignored the letter and quickly published his own short paper.
• B. He immediately published his book “On the Origin of Species”.
• C. He quickly published his own paper jointly with Wallace’s letter.
• D. He published the letter from Wallace first, and waited to publish his ideas until he had finished his book “On the Origin of Species”.