Definition: You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.
Input: Question: In how many ways can the letters of the word REPEATED be arranged?

 Option A: 1206

 Option B: 1348

 Option C: 6720

 Option D: 3000

 Option E: 3478

Option C