Final answer:
The correct contrast between Kant's and Ross's views is that Kant held universal moral rules, as seen in his categorical imperative, while Ross proposed prima facie duties that are context-sensitive and may conflict, necessitating practical judgment in specific cases.
Step-by-step explanation:
Contrasting Kant's and Ross's views of moral rules, we can identify that Kant believed in universal moral rules, while Ross advocated for prima facie duties. Kant's approach to morality is rooted in the idea that certain moral rules are absolute and must be followed without exception, formulated as a part of his deontological ethics.
These are encapsulated in the categorical imperative, which demands actions that can be universalized without contradiction. In contrast, Ross acknowledged that our moral experiences are often too complex for a single principle to govern. He believed that we have multiple moral duties that are not absolute but hold unless overridden by more pressing duties in specific situations. Thus, the correct answer to the provided question is 'a. Kant: Universal moral rules, Ross: Prima facie duties.'