Final answer:
Nativists used political cartoons, among other media forms like yellow journalism, to sway public opinion against newer immigrants, capitalizing on prevailing stereotypes and fears. Therefore, the correct option is D. Political cartoons
Step-by-step explanation:
The form of media that nativists used to turn public opinion against newer immigrants was political cartoons. During the era when nativism was on the rise, various media forms were used to spread the message of the nativists, who were biased against "nonwhite" immigration and those who practiced different customs or religions.
Although options like yellow journalism and opinion columns were also utilized to influence public opinion, it was the stark and often provocative imagery of political cartoons that visually depicted immigrants as threats and were widely spread in newspapers. These cartoons capitalized on stereotypes and fears to sway public perception against new arrivals.
Notably, publications like those guided by yellow journalism also played a significant role in sensationalist reporting to increase circulation and ultimately shaped public sentiment. The use of media was part of a broader xenophobic movement that included organizations like the American Protective Association and the Immigration Restriction League, which campaigned to limit the influence and movement of immigrants.