Answer: A) death arrived at her door like an unwelcome stray dog.
Explanation: A simile is a figure of speech that consists in making a comparison between elements that aren't obviously related, this comparison is made using the words "like" and "as." From the given options, the excerpt that represents an example of a simile, is the corresponding to option A, because it compares death to an unwelcome stray dog by using the word "like."