Final answer:
Working for a political campaign does not constitute acting as an agent.
Step-by-step explanation:
The correct answer is d. Working for a political campaign. Acting as an agent typically involves representing another party's interests and performing specific tasks on their behalf. In this case, all of the other options involve acting as an agent by representing and performing tasks for political parties, protesters, or elected officials. However, working for a political campaign is a personal choice and does not necessarily involve acting as an agent for someone else.