Sodium Chloride, an Ionic Compound, Should Be Most Soluble in Which

Sodium chloride, an ionic compound, should be most soluble in which solvent? ( $\varepsilon$ = dielectric constant)
(a) hexane $( \epsilon = 2 )$

(b)

acetone $( \epsilon = 19 )$

(c)

$N$ -methylpyrrolidone $( \epsilon = 32 )$

(d)

$\text { N., } \text {-dimethylformamide }(\epsilon=37)$

(e)

dimethylsulfoxide $( \epsilon = 47 )$

A) compound a
B) compound b
C) compound c
D) compound d
E) compound e