A student studied how four metals, R, S, T and U, reacted with solutions of their salts. The results are shown in the table. What is the order of reactivity of the metals, with the most reactive first?
- A$R \rightarrow S \rightarrow U \rightarrow T$
- B$R \rightarrow T \rightarrow U \rightarrow S$
- C$S \rightarrow U \rightarrow T \rightarrow R$
- D$U \rightarrow R \rightarrow T \rightarrow S$