请教填空，highlight 与culmination 是同义吗？

ep6h123UID: 2960051

Du Bois’ foreign trips were the highlight, not the ____, of his travels; he was habitually on the go across and around the United States.1 X1 b/ ~. W7 s4 A" q0 }
A.idiosyncrasy2 ^# N# [- f% k, U1 G* @5 V
B.result8 }" ^  Q# z6 h" T
C.precursor$ `6 I* N1 ?/ }# N" V- S; R3 H
D.culmination
E.totality(right)           

highlight 与culmination 有没有同义递进的意思？就是说， 理解成： 某人的国外之旅是亮点但不是最亮点 为什么不行？
我知道totality是答案。就是想请教highlight 与culmination 的区别。

萝卜须根多UID: 3008387

我觉得没有同义递进的意思
highlight：1 : the lightest spot or area (as in a painting)  : any of several spots in a modeled drawing or painting that receives the greatest amount of illumination
2 : something (as an event or detail) that is of major significance or special interest
culmination：1 : the action of culminating
2 : culminating position  : CLIMAX
也就是其实这两个强调的方向不一样

如果你对以上解释有疑惑的话，那只从这个题来看，后面he was habitually on the go across and around the United States也看不出国内游有亮点之类的意思

ep6h123UID: 2960051

谢谢萝卜斑竹。