Identify structure “A” on the heart diagram

Identify structure “A” on the heart diagram.
a. left atrium
b. aortic semilunar valve
c. bicuspid (mitral) valve
d. right atrium
e. pulmonary semilunar valve

Systemic blood vessels transport blood
a. from the left ventricle through the body to the left atriumb. from the left ventricle through the body to the right atriumc. from the right ventricle through the body to the left atrium
d. from the right ventricle through the body to the right atrium
e. from the left ventricle to the lungs