Answer :
Penn's writings about his plans for the settlement of Pennsylvania would most likely give you the most information and insight into the life and thoughts of William Penn. A fictional story would not be complete or accurate, a single letter would not have a great deal of information, and paintings and images would also not give you as much information as his writings.
A fictional story about the history of Pennsylvania
A single letter from a settler to Penn
Paintings and images of Pennsylvania
Penn's writings about his plans for the settlement
B or D
probably D