Final answer:
Megan's rapid reading and comprehension exemplify automatic processing, which is the unconscious encoding of information such as the meaning of words. The correct option is B.
Step-by-step explanation:
When reading a novel at a speed of 500 words per minute and understanding almost every word, Megan showcases the importance of automatic processing. Automatic processing refers to the encoding of informational details such as time, space, frequency, and the meaning of words without conscious awareness.
In Megan's case, her ability to read and comprehend quickly without actively thinking about each word signifies that these language processing skills have become automatic due to frequent use and practice. Hence, B is the correct option.