Which Statement A-D Regarding the Terms Mole and Molar Mass

Multiple Choice

Which statement A-D regarding the terms mole and molar mass is not correct?

A) A mole is defined as the number of particles in exactly 12 g of carbon-12.
B) A mole of oxygen gas contains 6.022 10²³ molecules.
C) Two moles of oxygen atoms can be obtained by decomposing one mole of carbon dioxide.
D) To obtain the molar mass in grams (g/mol) from the atomic mass in atomic mass units(u) , multiply by 6.022 10²³/mol and divide by 6.022 10²³ u/g.
E) Statements A-D all are correct.