Answer
<u>B. Progressives believed that the assimilation of immigrants would make them less loyal citizens</u>
Explanation
Progressives strongly believed in American ideas and progress. These individuals believed that ethnics and class problems were as a result of self/private interest over the interest of many people that led to corruption and a spoiled political system. Progressives proposed the unification of all classes and ethnic groups to form a single middle class with people with similar traits.
This is Hiroshima. The bomb that was used was the Atomic Bomb. It should be "B", because everything was completely destroyed besides the building shown in the picture.