Why Are Farm Publications Not Classified with Business Publications

Why are farm publications not classified with business publications?

A) Historically farms have not been perceived as businesses.
B) The number of farm magazines,if added to the number of business magazines,would make the category too large.
C) Farm magazines are a hybrid of consumer and business magazines.
D) The service that did the initial classification of magazines was owned by a farm publication.
E) Federal laws require the breakout of farm magazines because subscriptions to these magazines help to determine farm allowances.