Which of the following represents the complexity of a password policy which enforces lower case password using letters from ‘a’ through ‘z’ where ‘n’ is the password length?

Which of the following represents the complexity of a password policy which enforces lower case password using letters from ‘a’ through ‘z’ where ‘n’ is the password length?

A.
n26

B.
2n * 26

C.
26n

D.
n2 * 26