How does heart failure affect the lungs? a.)Too much oxygen enters the lungs.
b.) Carbon dioxide enters the lungs.
c.)Blood leaves the lungs.
d.)Fluid can build up in the lungs.

I'm confident it's D. Fluid can build up in the lungs

D.

Explanation: I think because when I look it up it says

A damaged heart can't pump blood as effectively from your lungs out to your body. Blood backs up, raising pressure in the veins inside your lungs. This pushes fluid into your air sacs. As liquid builds up, it gets harder to breathe.

so it builds up

how can i get poiintts