The CEO says to her marketing manager, "The sales for 2011 were 1000 units higher than 2012, and the sales for 2013 were 1000 units higher than 2014. I'd say we're safe in forecasting 2015 sales as 1000 units greater than 2014." The CEO was most likely talking about the results of a _____ forecast.
A.
Delphi
B.
jury of executive opinion
C.
direct
D.
linear trend extrapolation
Answer: D