Ammonium sulfate, $(N{H}_4{)}_{2}S{O}_4,$ is a water$-$soluble salt. The diagram below shows $(N{H}_4{)}_{2}S{O}_4$ after the dissolution process has occured. Which ion below $(A$ or $B)$ is the ammonium ion? Which ion below $(A$ or $B)$ is the sulfate ion?

not enough information to determine the identity of $A$ or $B.$

$A$ is an ammonium ion $(N{H}_4^{+})$; $B$ is a sulfate ion $(S{O}_4^{2-}).$

$A$ is a sulfate ion $(S{O}_4^{2-})$; $B$ is an ammonium ion $(N{H}_4^{+}).$

can u explain why the second option is the correct answer