Final answer:
Bronchial arteries carry oxygenated blood to the tissues of the lung for nourishment, while the pulmonary arteries transport deoxygenated blood to the lungs for gas exchange.
Step-by-step explanation:
Bronchial arteries (as opposed to pulmonary arteries) carry oxygenated blood to the tissues of the lung. These arteries are part of the systemic circuit, as they arise from the aorta or one of its branches and provide the lung tissues with oxygen-rich blood necessary for their nourishment.
The pulmonary arteries, in contrast, carry deoxygenated blood from the right ventricle of the heart to the lungs for gas exchange. During this gas exchange process in the lungs' alveoli, blood becomes oxygenated before returning to the left atrium of the heart through pulmonary veins. Therefore, the correct answer is A. oxygenated.