18 X, who is 18 years old and has domicile in country C, possesses the nationality of country A. X entered
into a contract with Y, a national of country B, in the R.O.C. Assuming that the law of country A adopts
the doctrine of lex domicilii on issues of personal law, which of the following laws should the R.O.C.
court apply on the issue of X’s behavioral capacity?
(A) The law of country A.
(B) The law of country B.
(C) R.O.C. law.
(D) The law of country C.