A composite number is a number that can be divided evenly by numbers excluding 1 and itself.
29 is a prime number because it is divisible by only one and itself, so A is not the correct answer.
29/29 = 1 | 29/1 =29
13 is a prime number because it is divisible by only one and itself, therefore, B is not the correct answer.
13/13=1 | 13/1=13
91 is a composite number because it is divisible by 1, 7, and 91.
Hope this helps! :)