Which of the following statement is CORRECT about controlled business? A$.$ a producer who violates the law on controlled business may be found guilty of a class $3$ felony b$.$ controlled business includes insurance written on the lives of a producer's employees within a $12$ month period c$.$ controlled business includes insurance written on the lives of a producer's children within a $12$ month period d$.$ the total premium written as controlled business may not exceed the total of all other business written within a $12$ month period