Which of the following words is closest in meaning to “Flabbergasted”?

Flabbergasted means greatly astonished.

• Correct answer - astonished: it has the same meaning as Flabbergasted.
• hysterical: out of control with emotion - wrong, it does not mean the same as Flabbergasted.
• animated: lively - wrong, it does not mean the same as Flabbergasted.
• adamant: refusing to change one's mind - wrong, it does not mean the same as Flabbergasted.