His wife and kids are staying in North Carolina for the year - she 's a resident professor at UNC ! He takes one look at my teeth and looks horrified . I ask him if he can do a filling and he says , " No filling .

OPTIONS: a). None of the above choices .; b). His wife is currently working in another state .; c). My dentist is still trying to sell his old house .; d). It is just a trial separation period before divorce .;
Q: Why do my dentist and his wife currently live in separate houses ?
b).