My guess is C for question one and D for question 2
<span>The question says,'what can be the cause of weakened muscle and kidney functioning. Lack of muscle use can cause weakened muscle and kidney diseases can cause a build up of toxins in the blood, due to slow filtration by the kidney. This can also leads to muscle weakness and tiredness, because the ability of the blood to carry oxygen to the muscles has been drastically reduced.</span><span />
Interact would be the answer
Hope it helps!
