Final answer:
C) The candidate's popularity is not a direct factor influencing the amount of money spent running for office, as it does not directly influence campaign spending but may affect fundraising.
Step-by-step explanation:
The question asks which factor does not influence the amount of money spent running for office. The factors listed that do influence campaign spending include whether the candidate is new or the incumbent, the amount of money raised, and what level of office the candidate is seeking. The candidate's popularity, while important for other aspects of a campaign, is not directly a factor in influencing the amount of money spent; rather, it may influence the ability to raise funds or garner support. Incumbents often have a fundraising advantage due to existing campaign war chests and established networks, which can significantly influence the amounts spent. So, out of the options provided, C) The candidate's popularity is the one that does not directly influence the amount of money a candidate spends running for office.