Answer:
B) President Truman's experience on Pennsylvania Avenue was not glamorous, and, in November of 1950, it became dangerous.
Explanation:
Transitions are single words, phrases or sentences that establish a logical connection between sentences and paragraphs. They develop a sense of what is to come later in the content. Transitions maintain a logical flow of ideas and provoke the reader to think and keep reading for new and interesting information.
In the current example, B is the appropriate transition as it conveys to the reader that something substantial is about to happen without mentioning the actual event.
An expository article is usually about explaining something or talking about it. So if it's a true story and you write it like a life story then yes it can be. If it's just a fictional story you want to write then no.
