A worker has the experience of flow when he or she:

A) has a rapid succession of ideas.
B) rapidly corrects personal mistakes.
C) piggybacks on the ideas of others.
D) is totally absorbed in the task at hand.

The concept of flow, as introduced by psychologist Mihaly Csikszentmihalyi, refers to a state of complete immersion and focus in an activity, where an individual is fully absorbed and enjoys the process of the activity. This is best described by option D, where the worker is "totally absorbed in the task at hand."