Read this excerpt from The Story of My Life by Helen Keller. What is the most likely reason, or purpose, for Keller to include this excerpt in her autobiography? The deaf and the blind find it very difficult to acquire the amenities of conversation. How much more this difficulty must be augmented in the case of those who are both deaf and blind! They cannot distinguish the tone of the voice or, without assistance, go up and down the gamut of tones that give significance to words; nor can they watch the expression of the speaker's face, and a look is often the very soul of what one says.

A.
to justify an action she took that others thought was controversial
B.
to help understand the events that changed her life
C.
to credit Anne Sullivan for all the ways she helped her
D.
to discuss the difficulties faced by the deaf and blind
E.
to explain the lessons she learned from the obstacles she faced