Choose the appropriate idiom that is closest to the underlined segment in the following.

Do something on impulse, without prior deliberation.

The phrase describes acting spontaneously without thinking ahead or planning.

Option 1 -> "at one's wit's end" means being extremely frustrated and not knowing what to do next. This doesn't relate to impulsive action.

Option 2 -> "at the drop of a hat" means doing something immediately without hesitation or planning, which perfectly matches acting on impulse.

Option 3 -> "at a good clip" means moving at a fast speed or pace. This describes how quickly something is done, not the lack of planning.

Option 4 -> "by the seat of my pants" means improvising or relying on instinct rather than a plan. While related, this focuses more on improvisation than the immediate, impulsive nature described.

Hence, Option 2: at the drop of a hat -> describes acting instantly without thinking or planning beforehand -> correct