Fact Pattern 10-1

Multiple Choice

Fact Pattern 10-1
Gert contracts to sell two tracts of land to Hank.Both parties believe that the two tracts are adjacent,but in fact they are not.Gert is still willing to sell the land,but under these circumstances the deal would adversely affect Hank.
-Refer to Fact Pattern 10-1.The parties' belief about the adjacency of the property is

A) a bilateral mistake.
B) a unilateral mistake.
C) fraud.
D) undue influence.