Read the excerpt from a passage about wind turbines.

the blades rotate based on wind speed and direction, so the sound isn’t consistent. there are swooshes, thumps, and then silence. the changing rhythm of the noise captures people’s attention, and it is harder to ignore. people living in rural areas expect it to be quiet, so they may be more aware of the noise. for those who live near a wind farm, their sleep patterns may be disrupted by the noise. and for those who live closer to turbines the sleep interference is worse. the lower frequency of the noise from wind turbines tends to be more bothersome. it has been associated with fatigue, sleeplessness, and irritability.

which line from the excerpt best supports the idea that the sound from wind turbines is more than just annoying?

a) "the changing rhythm of the noise captures people’s attention, and it is harder to ignore."

b) "it has been associated with fatigue, sleeplessness, and irritability."

c) " the blades rotate based on wind speed and direction, so the sound isn’t consistent."

d) "people living in rural areas expect it to be quiet, so they may be more aware of the noise."