How Does a Polite Request Differ from a Direct Question

Multiple Choice

How does a polite request differ from a direct question?

A) A polite request ends with a question mark.
B) A polite request ends with a period.
C) A direct question ends with either a period or a question mark.
D) A direct question is the topic sentence of a routine request's closing paragraph.
E) A polite request includes a statement of goodwill.