May an oral donation propter nuptias be the basis of a title?

• A. No, because it must be in a public instrument;
• B. No, because it must be in writing;
• C. Yes, through adverse possession for 30 years. (Pensader v. Pensader, 47 Phil. 459);
• D. No, because it is not effective as a transfer of title. (Heirs of Maningding v. CA, 31 July 1987; Gesmundo v. CA, 23 December 1999).