Identify (Z) in the following series.
`Ethanol overset(PBr_(3))to (X) overset(Alc.//KOH)to (Y) overset((i)H_(2)SO_(4)//("Room temp")) underset((ii)(H_(2)O,Heat))to(Z)`
A. `C_(2)=CH_(2)`
B. `CH_(3)CH_(2)OH`
C. `CH_(3)-CH_(2)-O-CH_(2)-CH_(3)`
D. `CH_(3)-CH_(2)-SO_(3)H`