PLS HELPP Which two statements describe the ocean floor
A It has more active volcanoes than the continents do
B. It is mostly flat, with very few landforms.
C. It has small mountain chains that form where sediment is
deposited
D. It has deep trenches that form at convergent boundaries.

d.

explanation:

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

the median of the data is 4.5.