A certain song with 8 verses is played at a different tempo in each verse. The recursion below defines the sequence an , the song's tempo (in beats per minute) in the n^6th verse.

a1=50
an=an-1+12
Which function represents the n^th term of this sequence, for n=1,2,3,4,...8?
A. f(n)=50+12n
B. f(n)=n+12
C. f(n)=(n-1)+12