Sara is a 6-year-old girl who has recently started experiencing disfluencies in her speech. Her parents have noticed that she often repeats sounds and syllables, prolongs certain sounds, and occasionally gets stuck on certain words. The disfluencies seem to be more noticeable when she is excited or feeling pressured to speak. Sara's parents are concerned about her speech and seek professional advice.

Which of the following disfluency characteristics is Sara likely exhibiting?