What's the recursive rule for the arithmetic sequence described in the following list? Use the rule to find the eighth term of the sequence.
5, 9, 13, 17, 21
Question 14 options:

A)

ƒ(n) = f(n – 1) + 4; 29

B)

ƒ(n) = f(n – 1) + 5; 36

C)

ƒ(n) = f(n – 1) + 4; 33

D)

ƒ(n) = f(n – 1) + 5; 31