Correct Answer: astonished

Solution : The correct choice is the third option.

Flabbergasted is the feeling of intense surprise or wonder.

Astonished is also used to describe a feeling of overwhelming surprise, making it the correct synonym for astonished .

The meanings of the other options are as follows:

• Disturbed is the state of being emotionally troubled.
• Motivated is the feeling of determination to do something.
• Terrified is used to describe an extreme state of fear or intense panic.