Reactivity series — practice question

Y displaces X from its aqueous sulfate solution. X does not displace W from its aqueous sulfate solution. X displaces Z from its aqueous sulfate solution. In what order do the reactivities of W, X, Y and Z go?

• AW, X, Y, Z
• BW, Y, X, Z
• CZ, X, Y, W
• DZ, W, Y, X