The outcomes of experiments on four metals, W, X, Y and Z, and their ions are shown below: $Y(s) + Z^+(aq) \rightarrow Y^+(aq) + Z(s)$ $W(s) + X^+(aq) \rightarrow$ no reaction $Z(s) + X^+(aq) \rightarrow Z^+(aq) + X(s)$ How are the reactivities of the four metals ordered, from the most reactive to the least reactive?
- A$W \rightarrow X \rightarrow Y \rightarrow Z$
- B$X \rightarrow W \rightarrow Z \rightarrow Y$
- C$Y \rightarrow Z \rightarrow X \rightarrow W$
- D$Z \rightarrow Y \rightarrow W \rightarrow X$