Based on the text below, choose the correct alternative: 'The heart is a hollow organ that has the function of pumping blood through the body. This...

Based on the text below, choose the correct alternative: 'The heart is a hollow organ that has the function of pumping blood through the body. This organ has four chambers, two atria and two ventricles. Blood arrives from the great circulation through the vena cava in the right atrium.'

a. When blood reaches the right atrium, it means that it is loaded with CO2 and that this stage is part of systemic circulation.
b. When blood leaves the heart, it means that it is loaded with CO2 and that this stage is part of systemic circulation.
c. When blood reaches the heart, it means that it is loaded with O2 to nourish the lung in pulmonary circulation.
d. When blood reaches the right atrium, it means that it needs to pass through the left atrium and be pumped to nourish organs and tissues.
e. When blood reaches the heart, it is ready to be nourished by the coronary arteries.
a) a and b are correct.
b) b and c are correct.
c) c and d are correct.
d) d and e are correct.
e) only a is correct.