The correct answer would be D. An anecdote is a short and interesting story!<span />
The campaign for women’s suffrage began in the 1830s, but it was not until the start of the 20th century that the movement truly took hold. Sounds more formal because it doesn't include a opinion and it doesn't include words that weren't cited from people there in that time.
When we understand the motivation behind a character's actions, the character becomes three-dimensional and believable. A reader is often given pieces of a character's backstory, also known as exposition, in order to make him three-dimensional.