I feel that I have seen a similar question in one of my official tests.
One should carefully break down the question. The question asks to Weaken the argument. Specifically, we are told that developers (owners of new buildings) should build buildings before inviting potential buyers.
So, the plan is (1) - build and (2) - attract tenants. The developers say that even though the price will be a bit higher than the price to build your own building. Well, what can weaken their reasoning? The easiest thing that comes in mind is that tenants may not want to buy for some reason. Maybe the price is too high. Maybe the location is bad. Maybe the taxes in that area are too high. Maybe there is lots of crime. There could be some other reasons, too. Let's look at the answer choices:
Quote:
(A) Construction costs in the area most attractive to new business are higher than in other parts of the city.
This is a tempting option, but if the construction costs are high, then they will be high for both developers and tenants, if the latter ones decide to build their own buildings.
Quote:
(B) Developers are aware of the types of business wishing to move into the area and concentrate on designing appropriate buildings.
This option strengthens the argument.
Quote:
(C) If developers do not sell every lot with a building on it, they will still be able to rent the space and regain some of their investment.
If anything, this option strengthens the argument.
Quote:
(D) Zoning regulations in some areas require that specific building materials be used, which could result in unforeseen costs for developers.
This option is similar to (A).
Quote:
(E) Potential buyers will likely want to design their own buildings, making it unlikely that they will purchase a site on which there is an existing structure.
Aha, if potential buyers are fancy and want to dictate their own rules (e.g. design), they will not buy anything from developers. Buyers will want to build their own buildings.