A. Wilde uses this chamd as an exclamation to emphasize surprise that anything of interest is done
Explanation:
The expression "What on earth" is used in sutures in which a character is extremely surprised and impacted by what is happening. Thus, we can say that Wilde used this expression with this intuition.
However, this expression can also be used to exclude revolt and regret over a certain situation that causes surprise, surprise, fright.
