What are the vertex, focus, and directrix of the parabola with the equation x squared plus 8 x plus 4 y plus 4 is equal to 0 ?
A
vertex open paren negative 4 comma 3 close paren ; focus open paren negative 4 comma 2 close paren ; directrix y is equal to 4B
vertex open paren 4 comma negative 3 close paren ; focus open paren 4 comma negative 7 close paren ; directrix y is equal to 1C
vertex open paren negative 4 comma 3 close paren ; focus open paren negative 4 comma negative 1 close paren ; directrix y is equal to 7D
vertex open paren 4 comma negative 3 close paren ; focus open paren 4 comma negative 4 close paren ; directrix y is equal to negative 2