Question 23 is based on the passage you have just heard.

听力原文

        Left-handed people can find it inconvenient to do certain things, writing in a notebook, for example. But there are a number of advantages of being left-handed. (22) [Research found that they were over-represented among fighters in combat sports. Left-handed fighters also had higher chances to win.] This confirms the fighter theory. Left-handers may also be better at remembering events. (23) [The explanation is that the two brain spheres of left-handers are more strongly connected.] Being left-handed might be a factor in mathematical ability. (24) [An Italian study found that for simple arithmetic, there was little difference between right- and left-handed performance, but for more difficult problem solving, left-handers won out. No one understands the reason for this.] Left-handed people may think differently. In one study, researchers showed the participants columns of abstract illustrations and asked them which ones they would prefer. Left-handed people were more likely to prefer the images on the left. Right-handed people preferred the ones on the right. Both groups disliked stuff on their opposite side. Left-handers are also over-represented in professional interactive sports. (25) [Researchers have looked at the influence of being left-handed on performance and interactive sports. Those that require the fastest reaction give left-handers the biggest advantage. So, if you have a left-handed child, you should encourage them to play table tennis, baseball and tennis.] Being left-handed maximizes their chances of success in these sports.

23. What is said to be special about left-handed people?（文章说左撇子的特殊之处在于什么？）

解析：C。录音前半部分提到，左撇子的两个大脑半球之间的联系更加紧密（the two brain spheres of left-handers are more strongly connected）。C项与此内容相符，其中的its two sides对应录音中的the two brain spheres，has a stronger connection是对录音中are more strongly connected的同义替换，故C项为正确答案。

错项排除：录音中没有比较左撇子和惯用右手的人谁的大脑更发达，也没有比较左撇子的左脑和右脑哪个更发达，故A项和B项排除。录音中虽然提到左撇子更容易在格斗运动中胜出，但不代表他们更加好斗，D项属于过度引申，故错误。