Read the following excerpt from a student essay. How can the writer best improve his or her grammar and mechanics?
Alfred Hitchcock's 1963 horror masterpiece The Birds is based on Daphne du Maurier's novella of the same name. In the film version, a quiet town in northern California is terrorized by birds, however, the book is set in Cornwall, England. Du Maurier was unhappy with the movie, which didn't stick to her original storyline, characters, or setting. Most people, though, still think of the film as a classic, in fact, the American Film Institute ranks it as the seventh most thrilling American film of the twentieth century.

 - by fixing run-on sentences
 - by fixing sentence fragments
 - by correcting verb tenses
The writer could best improve his or her grammar and mechanics by fixing run-on sentences.
For example, the writer could revise the underlined text.
Alfred Hitchcock's 1963 horror masterpiece The Birds is based on Daphne du Maurier's novella of the same name. In the film version, a quiet town in northern California is terrorized by birds, however, the book is set in Cornwall, England. Du Maurier was unhappy with the movie, which didn't stick to her original storyline, characters, or setting. Most people, though, still think of the film as a classic, in fact, the American Film Institute ranks it as the seventh most thrilling American film of the twentieth century.