Select the correctly punctuated sentence.
a: Though many believed Doug Williams had excellent taste, William's choice of television program didn't agree with the childrens'.
b: Though many believed Doug Williams had excellent taste, Williams' choice of television program didn't agree with the childrens'.
c: Though many believed Doug Williams had excellent taste, William's choice of television program didn't agree with the children's.
d: Though many believed Doug Williams had excellent taste, Williams' choice of television program didn't agree with the children's.