Answer:
correct option is here B. About 14.3
Step-by-step explanation:
given data
running sum of forecast errors RSFE = 500
mean absolute deviation MAD = 35
solution
we get here tracking signal that is express here as
tracking signal =
.................................1
put here value and we will get tracking signal
tracking signal =

tracking signal = 14.3
so correct option is here B. About 14.3