Final answer:
The Latin motto 'Non Sibi Sed Allis' means 'Not for themselves but for others,' indicating that a) trustees serve the public interest by working towards the common good and general welfare, thus embodying a spirit of altruism.
Step-by-step explanation:
The Latin motto Non Sibi Sed Allis translates to "Not for themselves but for others," which implies that a) trustees are meant to serve with a spirit of altruism and public interest. This ethos suggests that the actions of trustees should align with creating a society that promotes social justice and serves the people, rather than seeking personal gain. When we consider the notion of public spirit, as defined by Mark C. Rom, it is about considering the interests of others in decision-making without necessarily sacrificing self-interest. However, in the case of the trustees' motto, there is a clear emphasis on prioritizing the welfare of others, which can be seen as an expression of altruism.
From the given options, the phrase 'Non Sibi Sed Allis' means a. Trustees serve the public interest. This interpretation aligns with the idea of a good society mentioned in the reference material, where the government and its trustees work towards the common good and general welfare, thereby ensuring that society is shaped not by personal desires for power or glory, but by a commitment to the betterment of others.