Final answer:
In the provided sentence, 'skepticism' refers to the doubt or questioning about machines fulfilling more than just physical needs, corresponding to option d. questions'.
Step-by-step explanation:
The meaning of the word skepticism in the sentence provided is best defined as doubt or questioning of a concept or belief. It reflects a view or an approach where people hold reservations about the certainty of knowledge or truth of something, often requiring further evidence or justification before accepting a claim. This word is derived from Greek, where it signifies the process of inquiry and examination. Thus, in the context provided, it would be more aligned with having doubts or questions—option d. questions—about the effectiveness or appropriateness of machines fulfilling more than just physical needs in the medical community.