The kid jumped with delight on seeing the (joker) at the circus.

Options

A. dud
B. ruffian
C. clown
D. No Improvement

Answer

C

Explanation

joker (N.): humorist, comedian, funny person. clown (N.) : a comic entertainer, especially one in a circus, wearing a traditional costume and exaggerated make-up.
Here, clown is the right usage.