GMAT CR: “Weaken” Practice Question!

Try this “Weaken” question — remember to take notes on the passage, then compare them to mine!

Although the organic farms in the agricultural community of Greendale are destined to shut down within the next decade as a result of competition from the organic mega-farm Full Foods, the farmland will not go unused for long. In the decade since the opening of OmniFoods, Inc., a non-organic farm conglomerate, a new owner has bought and reopened every farm in Greendale that has shut down due to competition with OmniFoods, Inc.

Which of the following, if true, most seriously weakens the argument?

A. Many customers of OmniFoods, Inc. are expected to buy less nonorganic food than they did before the Full Foods farm opened in Greendale.
B. The new farms that have opened in the agricultural community of Greendale since OmniFoods, Inc. opened have been primarily organic farms.
C. Many farms in Greendale sell produce that is not available to buy from either OmniFoods, Inc. or from Full Foods.
D. The demand for organic food is expected to increase at a faster rate over the next decade than at any time over the past fifty years.
E. The agricultural community of Greendale currently has more different farms operating within its borders than it ever has before

Here’s how to break this one down!

Conclusion: Farmland will not go unused when small farms shut down.

Evidence: Omnifoods precedent

Assumption: What is true for non-organic Omni is true for organic Full Foods.

Question: What WEAKENS?

Prediction: If there is a difference between Full Foods & Omni’s practices

A – customers are irrelevant
B – shows a difference
C – farmland could still be used regardless of what is sold
D – demand is irrelevant
E – change in diff types of farms over time is irrelevant