GMAT Critical Reasoning (CR) | Re: American "heirloom" tomatoes, once common varieties of the fruit that

BF1: Is a belief. "...the farmers believe"
BF2: Is a conclusion. "If...BF1 then...BF2"
SoBF1-->BF2 .
Position of the argument/Conclusion: Heirloom growing farmsshouldn't be hasty as [extra info that supports use of artificial condition]

Answer choice analysis.
A. Wrong. BF2 is not the position taken by the argument
B. Wrong. BF1 is not the position that the argument takes. In fact it goest against the position that the argument takes.
C. Wrong. BF2 doesn't provide any background for BF1.
D. Correct. BF1 is
...

---