The word “____" is the antonym of the word dull in the sentence

The word “____" is the antonym of the word dull in the sentence She became dull and silent during the last part of the journey.
A、interesting
B、lively
C、intelligent
D、acute
【正确答案】：B
【题目解析】：“lively”一词是“dull”一词的反义词，在句子中她在旅程的最后一段变得沉闷而沉默。