Detailed Instructions: This task involves asking a question, providing a set of 2 options. You are expected to choose the best answer to the question. The output will be in the form of A or B, corresponding to which option is chosen.
Problem:Question:What is the only county in the USA to border 5 counties from 5 different states : Baca County, Colorado; Morton County, Kansas; Texas County, Oklahoma; Dallam County, Texas; Union County, New Mexico ? ,  Options: [A.Cimarron County B.Dallam County] 
Solution:
A