ahaimenis
Hi all,
Regarding D, why can’t I think that the fact that grocers have the choice to not sell the product but end up selling has an underlying reason for it? Therefore, weakening the conclusion that they shouldn’t sell?
I'm not sure where you're getting the "end up selling" part from. Choice (D) simply tells us that the grocers are not
forced to sell the new products. It does not say that the grocers actually do end up selling those products.
Also, keep in mind that the conclusion is not "grocers
should not sell new products" or "grocers
will not sell new products". This is the conclusion: "there is
little reason for grocers to
encourage the introduction of new products."
In other words, there's no incentive for grocers to put the new products on their shelves. Why not? Because, for example, a customer choosing to buy Brand X detergent instead of Brand Y detergent doesn't change the
total amount of detergent purchased by that customer. If the customer is going to buy 100 gallons of detergent per year from the grocer regardless of the brand, then (according to the passage), the grocer doesn't care what brand(s) of detergent the customer buys.
For more one why (E) is correct, check out this post:
https://gmatclub.com/forum/new-grocery-products-benefit-the-manufacturer-but-not-the-grocer-if-324659.html#p2636636.