What products result when aqueous solutions of ${\mathrm{CuCl}}_2$ and ${\left({\mathrm{NH}}_4\right)}_2\mathrm{S}$ are mixed?

The following reaction was obtained when  ${\mathrm{CuCl}}_2$ and ${\left({\mathrm{NH}}_4\right)}_2\mathrm{S}$ is mixed,

$\mathrm{CuS}\left(\mathrm{s}\right)+{\left({\mathrm{NH}}_4\right)}_2\left(\mathrm{s}\right)\to \mathrm{CuS}\downarrow +2{\mathrm{NH}}_4\mathrm{Cl}\left(\mathrm{s}\right)$ 

when ${\mathrm{CuCl}}_2$ and  ${\left({\mathrm{NH}}_4\right)}_2\mathrm{S}$ is mixed, $\mathrm{CuS}\left(s\right)$ and ${\mathrm{NH}}_4\mathrm{Cl}\left(s\right)$ is obtained

Hence the correct option is B.