The correct answer is D. Johnny is engaged in the ethnocentrism.
Step-by-step explanation
Ethnocentrism is a human ideology through which individuals analyze the world according to the criteria of their reality. It is a concept developed by anthropology to mention the tendency that leads a person or social group to interpret reality from their cultural parameters. Ethnocentrism supports the idea the own cultural group is the most important, or that some or all aspects of one's own culture are superior to those of other cultures.
Johnny's case is an example of ethnocentrism because he considers that only people who take pride in being workers, loyal supporters of the Republican Party, strong patriots and God-fearing Christians, are true Americans and this suggests Jhonny believes other cultural traits or group are inferior or not appropiate. So, the correct answer is D. Johnny is engaged in the ethnocentrism.