Final answer:
Chinese parents using the argument that aborting female fetuses prevents economic harm are employing an economic argument, influenced by government incentives and cultural preferences for sons.
Step-by-step explanation:
When Chinese parents argue that aborting female fetuses prevents economic harm to the family and should be allowed, they are using a c) economic argument. This perspective is informed by the economic pressures and incentives, such as government benefits and social norms that favor having a son to carry on the family name and provide financial security. Such practices have been influenced by government policies that, while intending to control population growth, have led to significant gender imbalances and cultural consequences.