In Which of the Following Situations Would the Contract Relating

In which of the following situations would the contract relating to land not be enforceable?

A) An unwritten agreement to have a garage built on the land
B) An unwritten sale of land where the seller allowed the buyer to enter the property and commence construction thereon
C) An unwritten lease for a term of five years
D) An unwritten lease of a lawn mower used to maintain the land
E) An unwritten sale of land where the sale was acknowledged in subsequent correspondence signed by the party denying the existence of the sale