Final answer:
McKenzie aims to persuade readers that giving is superior to receiving by encouraging acts of generosity, such as volunteering at a local charity, which align with the moral value of helping those with less.
Step-by-step explanation:
To persuade readers that giving is better than receiving, McKenzie would want the reader to focus on actions that reflect the spirit of generosity and the positive impact it has on the lives of those with less. Therefore, the correct answer to the question would be option b) Volunteer at a local charity. This choice is aligned with the principle that acts of giving, such as volunteering or donating to those in need, are seen as inherently more valuable and noble than self-centered actions. This concept is further supported by the passage which suggests that while self-interest might be a natural consideration in economic transactions, people often set aside these interests to perform selfless acts that benefit others. McKenzie aims for readers to recognize the joy and virtue in altruism, rather than focusing solely on personal gain or materialistic exchanges as suggested by options a), c), and d).