Which statement is an analogy?

Democrats and Republicans often see each other as enemies.
Most Americans support either the Republican or Democratic party.
A two-party political system makes forming a third party difficult.

Question

Which statement is an analogy? 
  
 Democrats and Republicans often see each other as enemies. 
 Most Americans support either the Republican or Democratic party. 
 A two-party political system makes forming a third party difficult.

anonymous · Answer

A is the right answer.

anonymous · Answer

An analogy is a comparison between two things, typically on the basis of their structure and for the purpose of explanation or clarification.