A, a citizen of Country X, marriedB, a national of Country Y. In 2008, they moved to Country Z where A died.C, the daughter of A and his ex-wife filed an action before a court in Z, claiming to inherit all the property of A in Z on the ground that the marriage between A and B was not valid. As to the validity of the marriage, the choice-of-law rule of Z referred to the law of Y which in turn referred to the law of X; therefore, the judge of Z applied the law of X to determine the merits of the dispute. The application of law in this manner is ().
选项：

A: remission
B: transmission
C: single renvoi
D: double renvoi