Given the task definition and input, reply with output. In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Among the entities, try to find the best entity that is most likely to fill in "_" and classify the answers based on options.

London (CNN) British Prime Minister David Cameron is to resign Wednesday, paving the way for Home Secretary Theresa May to take the reins. May was officially named Conservative Party leader and successor to Cameron "with immediate effect" Monday, said Graham Brady, chair of the 1922 Committee, a collection of Conservative members of Parliament key to electing the party leader. She will replace Cameron on Wednesday evening. In remarks shortly after her leadership was affirmed, May said her priorities will be to administer Britain's exit from the European Union, a move approved by voters last month, to unite the country and to create a "strong, new, positive vision for the future," not just for the privileged few, but for everyone.Theresa May officially named Conservative Party leaderMay's sole rival, Andrea Leadsom, pulled out of the race 
 Questions:The country is entering uncharted territory -- it is unprecedented for a candidate in _ to run unopposed at this stage of a leadership change, and May's quick succession to the country's leadership is raising questions about the whole process. (A) London (B) CNN (C) British (D) David Cameron (E) Theresa May (F) Conservative Party (G) Cameron (H) Graham Brady (I) 1922 Committee (J) Conservative (K) Britain (L) European Union (M) May (N) Andrea Leadsom

(K)