Final answer:
High frame rates are preferred for cardiac imaging to accurately display cardiac motion.
Step-by-step explanation:
The correct answer is B) For accurate display of cardiac motion.
High frame rates are preferred for cardiac imaging because they allow for more accurate display of cardiac motion. By capturing a greater number of frames per second, a high frame rate provides a smoother and more detailed representation of the movement of the heart and its structures. This is particularly important in cardiac imaging as it allows for better visualization of abnormalities and abnormalities in cardiac function.