Answer:
C.
Step-by-step explanation:
The murmur of this patient is possibly caused by an atrial septal defect that induces excessive blood flow through the pulmonary outflow tract, and should be examined.
B is right assess measures but this is not a ventricular septal defect (Vsd) that normally has a holosystolic murmur and a second heart sound that splits with respiration component.
Hence, the correct option is C.