4, 5, 9, 27, 123 how do i get the next term?

a)by adding 3 to the term number, then finding the factorial of the resultb)by finding the factorial of the term number, then adding 3 to the resultc)by adding 4 to the term number, then finding the factorial of the resultd)by finding the factorial of the term number, then adding 4 to the result