Choose the word closest in meaning to the underlined word.

Why did you make that flippant remark about her choice of clothes?

The correct option is disrespectful.

Step-by-step Explanation:

1. Understand the meaning of the target word:
The word "flippant" is an adjective used to describe a remark, attitude, or behavior that is not serious or respectful. When someone is flippant, they treat a serious, sensitive, or worthy subject with inappropriate levity, disrespect, or casual dismissiveness.

2. Analyze the context of the sentence:
In the sentence, "Why did you make that flippant remark about her choice of clothes?", the speaker is questioning and expressing disapproval of a comment. The context indicates that the comment was inappropriate, rude, and showed a lack of proper respect for the other person's personal choice of attire.

3. Evaluate the given options:
- disrespectful: This means showing a lack of respect or courtesy. Since being flippant directly involves showing a lack of respect or a dismissive attitude, this is the closest synonym.
- sarcastic: This refers to using irony to mock or convey contempt. While a flippant remark can sometimes be sarcastic, sarcasm is a specific rhetorical device, whereas flippancy is more broadly about a lack of respect.
- casual: This means relaxed, informal, or unconcerned. Although flippant remarks are informal, the word "casual" does not capture the negative element of rudeness or disrespect inherent in "flippant".
- indifferent: This means having no particular interest or sympathy. This does not fit, as making a remark shows active engagement rather than indifference.

Therefore, disrespectful is the word closest in meaning to the underlined word "flippant".