Philosopher: It has been argued that because particular moral codes differ between cultures, morality must be entirely a product of culture and cannot be grounded in some universal human nature. This argument is flawed. Research suggests that certain moral attitudes, such as disapproval of unfairness and cruelty, are shared across all cultures. And just as certain universal tastes like sweetness and saltiness can, in different cultural contexts, provide the basis for many different cuisines, _______.
Which one of the following most logically completes the argument?
moral codes tend to be based in the specific contexts in which they arise
the moral codes of most cultures resemble each other in many respects
a variety of moral codes can be based in shared moral attitudes
it is possible to understand the basis of the moral codes of different cultures
moral attitudes can be adapted to suit the moral codes of many different cultures