Trong các tính chất sau, tính chất nào sai?

A. \(\left\{ \begin{array}{l} 0 < a < b\\ 0 < c < d \end{array} \right. \Rightarrow \frac{a}{d} < \frac{b}{c}\)

B. \(\left\{ \begin{array}{l} a < b\\ c < d \end{array} \right. \Rightarrow a - c < b - d\)

C. \(\left\{ \begin{array}{l} a < b\\ c < d \end{array} \right. \Rightarrow a + c < b + d\)

D. \(\left\{ \begin{array}{l} 0 < a < b\\ 0 < c < d \end{array} \right. \Rightarrow ac < bd\)