A person with a type B lipid profile is at much greater risk of heart disease than a person with a type A lipid profi...

shunhe on April 17, 2020

Hi @Maria- Marin,

Thanks for the question! The problem with (D) here is that it tells us that the reduction in cholesterol levels in the volunteers is solely responsible for the change in their lipid profiles. Couple of problems with this one: we’re not actually given an explanation for why the lipid profiles changed, so we don’t know that it has to do with the reduction in cholesterol levels. Also, even if it were true, to say that the cholesterol level reductions are SOLELY responsible for those changes is way too strong of a statement, since there could have been other factors involved. Also, the group that experienced the cholesterol level decrease were the type B volunteers, who had unchanged lipid profiles. But the group that showed no benefit from the diet and had changing lipid profiles was the type A volunteers, which were another group.

Hope this helps. Feel free to ask any further questions that you might have.