Select the most appropriate meaning of the highlighted idiom in the following sentence.

He was quaking in his boots when he had to give a speech on the stage.

Correct option is C

The most appropriate meaning of the idiom "quaking in his boots" is "to tremble with fear." This idiom is used to describe someone who is extremely scared or nervous.
· Meanings of the other given options:
· To tremble in excitement: To shake slightly because of being very excited.
· To shake in happiness: To quiver or tremble due to a strong feeling of happiness.
· To shake in excitement: To move slightly back and forth due to a strong feeling of excitement.