To find the middle of an N-period moving average, we use:
A.
(N+1)/2, rounding up to the closest integer if N is even.
B.
(N-1)/2, rounding up to the closest integer if N is even.
C.
(N-2)/2, rounding up to the closest integer if N is even.
D.
(N+2)/2, rounding up to the closest integer if N is even.