In how many ways can letter of the word MAILINGS arrange so that M and N always come together?

In how many ways can letter of the word MAILINGS arrange so that M and

1.	In how many ways can letter of the word MAILINGS arrange so that M and N always come together?
A.	5040
B.	10080
C.	40320
D.	20160
E.	30240
Answer» B. 10080