Exclusion of the operation of a single section or subsection of the Sale of Goods Act, R.S.A. 2000, c. S-2 is permitted by some sections of the Act. Which of the following sections contain a provision permitting this exclusion? Select one: O a. Sections 12, 22 and 56 O b. Sections 14, 20, and 33 O O c. Sections 14, 20, and 55 O d. Sections 20, 22 and 54