The acrobatic displays left the spectators stunned.
Correct Option: Answer is C
Explanation: In the given sentence, the phrase “The acrobatic displays left the spectators stunned” suggests that the spectators were left in a state of awe, surprise, or amazement by the acrobatic displays. “Stunned” means being overwhelmed or deeply impressed by something unexpected or remarkable.
Therefore, option C, “astonished,” is the most appropriate choice to complete the sentence, as it accurately describes the spectators’ reaction to the acrobatic displays.