The liver cells produce proteins to avoid blood clotting. They also break down old or damaged blood cells.
Answer:
c
Explanation: i did this a couple months ago
It is the third choice.
The first one is a single replacement
The second one it a decomposition
The last one is combustion
They'd observe any new substances or new color, and temp. that is irreversible.
If this helped and you have any other questions, feel free to comment on my wall. Hope this helped.