Correct Option: C

acrobat (N.) : an entertainer who performs difficult acts such as balancing on high ropes (at a circus) ; an athlete who performs acts that need skill, agility and coordination
athlete (N.) : a person who competes in sports - running, jumping, physical exercises, etc.
juggler (N.) : a person who juggles - to throw a set of three or more objects in air and catch and throw them again quickly, one at a time; an entertainer
conjuror (N.) : a person who performs magic tricks which seem to make things appear or disappear