Alphabetical Ordering Steps

1. 
   Identify the Common Prefix:
   

   
   All four words start with the same three letters: "Rum". To determine the correct order, we must compare the fourth letter of each word.
   

   
   


2. 
   Compare the Fourth Letters:
   

   Let's list the words and their deciding fourth letters:

   
   
   
   
   • Rumanian → 'a'
   
   
   • Rumbustious → 'b'
   
   
   • Rumour → 'o'
   
   
   • Rumple → 'p'
   
   
   
   


3. 
   Arrange in Alphabetical Order:
   

   The alphabetical order of these deciding letters is a, b, o, p. By matching these letters back to their corresponding words, we get the final sequence.

   
   

Final Answer: The correct alphabetical order is Rumanian, Rumbustious, Rumour, Rumple.