hastily
suddenly
thoughtlessly
impulsively
Answer is Right!
Answer is Wrong!
The correct answer is B. suddenly.
- Gradually means in a slow and steady way.
- Hastily means in a quick and careless way.
- Suddenly means quickly and unexpectedly.
- Thoughtlessly means without thinking carefully.
- Impulsively means without thinking about the consequences.
In this case, the antonym of gradually is suddenly. This is because gradually means in a slow and steady way, while suddenly means quickly and unexpectedly.