根据录音中的“the damage…even to the psyche of the children involved could be even more severe”可知，对留守儿童心理造成的伤害会更加严重。因此选C项。

【听力原文】
China has 61 million so-called "left-behind children". Economists say this is the price of China's modernization, and it could jeopardise the next generation of Chinese growth. Children educated in poor rural schools, without literate parents to help them, may be unable to fuel the new innovation-led growth that Beging is aiming for. And the damage to Chinese society, to the family system and even to the psyche of the children involved could be even more severe, according to economists, government researchers and others who have studied the left-behind child phenomenon.