The correct answer is A. Exposition
Step-by-step explanation:
In this section of the story, the narrator and main character David Copperfield focuses on providing information about himself including a description of the day he was born and his "gifts". This shows the purpose of this excerpt is to introduce the main character to the reader as well as the general context of the story. These features belong to the exposition of the story, which is the first section of the story that introduces basic elements such as context, main characters, background information, etc.