Hi Rastis,

This CR prompt is written in a "quirky" way - and it's not exactly how the GMAT writers would have written it. It's understandable why you chose D (and I'll get to that in a moment), but here's what I think the writer actually intended....The CR prompt revolves around a "plan", so we're likely looking for an assumption that confirms that the plan will "work" (have the desired effect).

The Facts:
-Anemic children NEED a boost in iron to reverse anemia.
-Pharmaceutical companies are experimenting with new injections to get anemic children that boost.

The Conclusion:
-The companies think that CHILDREN suffering from anemia will be CURED through the use of these (re: the company's) injections/supplements.

The Logic:
Since the pharmaceutical companies are focused on boosting the iron of anemic children, a logical question to ask is "is a lack of iron the only thing that causes anemia?" In other CR prompts, THAT would be the issue (and the answer would be D). Here though, we're given the information that a boost of iron is what anemic children NEED to reverse their conditions, so we have to take that at face value (re: ALL they need is more iron and they'll be cured and nothing else matters). With that established, the issue now becomes how do we get from "there are injections/supplements that cure anemia" to "children are now cured of anemia"? In real simple terms, the injections have to get to the children - THAT part of the plan is missing from the prompt, so it has to be the assumption that the prompt was asking for. Answer B gives us that.

GMAT assassins aren't born, they're made,
Rich