C.
The information required for the calculations is very easily obtained, making this an advantage of the method.
Usally the traits you inherite from your mother is usally the eyes and nose and for the father is usally the hiegt you are the weight and from both is usally the around the bout the face the complection the form of your face
No, heredity essentially involves only traits which are passed on by genes and the genetic expression of genes. This doesn't involve any environmental influences or anything similar. Although this view is outdated and it is today known that environmental influences get also inherited.
I’m not an expert on the field, but based off of process of elimination and what I do know, I’d say b.