Chọn câu sai: \(\frac{A}{B}.\left( {\frac{C}{D} + \frac{E}{F}} \right) = \frac{A}{B}.\frac{C}{D} + \frac{E}{F}\)

A. \(\frac{A}{B}.\frac{B}{A} = 1\)

B. \(\frac{A}{B}.\frac{C}{D} = \frac{C}{D}.\frac{A}{B}\)

C. \(\left( {\frac{C}{D}.\frac{E}{F}} \right)\)

D. \(\frac{A}{B}.\left( {\frac{C}{D} + \frac{E}{F}} \right) = \frac{A}{B}.\frac{C}{D} + \frac{E}{F}\)