In each of the given questions, three sentences are given with a phrase/idiom highlighted in bold. You have to select the answer choice that states the combination of statements in which the idiom has been correctly used.

I. I know it's mean-spirited, but I can't help but laugh in my sleeve when I see someone slip on the icy streets.

II. After losing Ohio to his opponent, the president now has a mountain to decline if he wants to hold on to his job.

III. I have a few tricks up my sleeve if he decides to pursue legal action against me.