Yi Conveyed a Piece of Land by General Warranty Deed

Multiple Choice

Yi conveyed a piece of land by general warranty deed.The deed included a covenant of seisin.With this covenant,Yi promised that:

A) she has the power to make the conveyance.
B) the land is free from any easement, profit, mortgage, etc.
C) no other person can lawfully claim the land.
D) she owns whatever estate she is conveying.