Answer:
This causes the pulmonary valve to close in the tricuspid valve to open. this lets blood flow right into the right ventricle that was returned to the right atrium from the body. when the left ventricle contracts, the right ventricle also contracts. this causes the pulmonary valve to open and the tricuspid valve to close.
Explanation:
Hope this helped Mark BRAINLEST!!!
See if he is breathing first then call the cops tell them whats going on then go to the wound wrap it put pressure on it then just wait.
The answer is D because acceptance is a good think so it wouldnt be A-C