The answer is B. Topical. The headings are organized and separated by topic.
The correct answer is B. Topical
Explanation:
In letters and other documents information can be organized in multiple ways, this includes chronological, spatial, topical, cause and effect, compare and contrast organization, among others. In the case of the topical organization, which is the most common organization pattern, the information is organized according to the topic, this implies there is a general or major topic and information is divided into sub-categories or sub-topics according to the main topic, these sub-categories are consistent with the main topic. In the case of the letter sent by the new dentists the information follow this type of organization, because it is divided according to sub-topics that compose the main topic, in this case, the main topic will be information about the new dentist office and the subcategories include the dentists in the office, the services and payment options, these subcategories composed the main topic and are consistent with it by grouping common ideas according to what they are about or their topic.