A Sold a Parcel of Land Covered by TCT No

A sold a parcel of land covered by TCT No. 9 to B. At the time of the sale, B knew that C has been in possession of the parcel of land as early as 10 years before the sale. B however checked with the Registry of Deeds and found the title to be clean. Is B a buyer in good faith?

A) B is a buyer in good faith because at the time of the sale, the title was clean.
B) B is a buyer in good faith because he merely relied upon the face of the title.
C) B is not a buyer in good faith because he had actual knowledge of facts and circumstances that would impel him to make inquiry into the status of the land due to the presence of C.
D) B is a buyer in good faith because there was no annotation of C's right if there be any.