A 'jiffy' is an actual unit of time.
A
Correct answer
Explanation
A jiffy is indeed a real unit of time used in physics and computing. In scientific contexts, it's often defined as the time it takes light to travel one centimeter (approximately 33.36 picoseconds). In computing, it commonly refers to one tick of the system timer, such as 1/60 or 1/100 of a second. The term has been in use since the 18th century.