Which of these is the best reason to explain why candidates for office hire campaign staff to run their campaigns?

Candidates for office hire campaign staff to run their campaigns so that someone will track how they are ranking. They think of campaign strategies for the candidates. They are the ones preparing schedules. They prepare their candidates for debates and they think of campaign tools that they are going to use. 

Because writing on paper is said to engrave what your writing down into your brain therefore writing your thoughts is better than speaking them.