challenge: When did John Hornley serve as the President of Magdalen College, Oxford?
  
  A. From 8 August 1448 until 25 September 1457
  B. From 8 August 1468 until 25 September 1477
  C. From 8 August 1438 until 25 September 1447
  D. From 8 August 1458 until 25 September 1467
  Answer: 