On a Sunday afternoon drive to the country side of Southeastern Pennsylvania in 1906, Pierre du Pont was struck by the variety of trees in Pierce Park. Collect it from far and wide, these hundred-year-old trees have been planted by the Pierce Brothers on this tract of land granted to their family by William Penn in 1702. According to the passage which of the following statements about the trees in Pierce Park is true?
A.They were planted in the early 1800s
B.They were collected by William Penn
C.They were seedlings in 1702
D.They were grown by Pierre du Pont