State Y passes legislation that requires that unless a father of children over the age of $5$ is found to be unfit, custody in divorce proceedings should be awarded to the father and not the mother. If this statute is challenged, the court will:

a$.$ defer to the legislature and will not determine whether such a classification of persons is constitutionally permissible.

b$.$ determine that fundamental rights and suspect classification are involved in this legislation.

c$.$ review the legislation to see if the preference to fathers bears a substantial relationship to an important governmental objective.

d$.$ only require that the legislation conceivably bears some rational relationship to a legitimate governmental interest.