What is the difference between a Serial Node and a Parallel Node in the Color page?

What is the difference between a Serial Node and a Parallel Node in the Color page?

• A. A Serial Node processes adjustments sequentially; a Parallel Node processes multiple adjustments simultaneously and combines results.
• B. A Serial Node processes in parallel; a Parallel Node processes sequentially.
• C. There is no difference; they are synonyms.
• D. Serial Node is used only for color grading; Parallel Node is for noise reduction.

Answer: (A)