Your friend Amanda suffers from a condition that reduces her blood's ability to carry oxygen. Which of the following is the name of that condition?

While you didn't provide us with any choices - the answer is clear. When someone suffers from a lessened ability of blood to carry oxygen, this would mean that this person suffers from a condition we call anemia.

Anemia is exactly this - a condition where the sufferer has a lessened ability to transport oxygen through his bloodstream.