Lupe receives a letter from someone claiming to be her second cousin, Alberto. Alberto's letter says that Lupe's name is listed as one of the possible owners of a piece of property that has been in the family for many years, but the ownership is very confused. Alberto asks if he can purchase Lupe's interest in the property. Lupe has no interest in getting embroiled in this controversy, so she agrees. What document should Lupe give to Alberto?

a.A general warranty deed

b.A mortgage

c.A quitclaim deed

d.A limited warranty deed