A student investigates the relative reactivity of four unknown metals, \(\text{W}\), \(\text{X}\), \(\text{Y}\), and \(\text{Z}\). Strips of each solid metal are cleaned and placed into separate test tubes containing \(1.0 \text{ M}\) aqueous solutions of the nitrate salts of the other metal ions (\(\text{W}^{2+}\text{(aq)}\), \(\text{X}^{2+}\text{(aq)}\), \(\text{Y}^{2+}\text{(aq)}\), and \(\text{Z}^{2+}\text{(aq)}\)). The table below summarizes the student's observations after \(15 \text{ min}\).

Solid metal	\(\text{W}^{2+}\text{(aq)}\)	\(\text{X}^{2+}\text{(aq)}\)	\(\text{Y}^{2+}\text{(aq)}\)	\(\text{Z}^{2+}\text{(aq)}\)
\(\text{W(s)}\)	—	No reaction	Reaction	No reaction
\(\text{X(s)}\)	Reaction	—	Reaction	Reaction
\(\text{Y(s)}\)	No reaction	No reaction	—	No reaction
\(\text{Z(s)}\)	Reaction	No reaction	Reaction	—

Based on the observations, which of the following lists the four metals in order of decreasing strength as reducing agents?