Provide an Appropriate Response

Multiple Choice

Provide an appropriate response.
-Consider the following counting problem. How many different sequences of 3 letters can be formed using the letters a, b, c, d, e if repetition is allowed?
To solve this problem which of the following rules would you use?

A) Both the permutations rule and the fundamental counting principle
B) The permutations rule only
C) The fundamental counting principle only
D) The combinations rule only