Lithe in this sentence means, like, a small slender body. Lithe means slender or thin. "Although Amelia was slender or graceful, her sister was clumsy and awkward."
D : textual evidence to support the thesis
C.: An extensive summary of the plot.
I believe it is a run-on sentence but i am not certain
As an affirmation of her loyalty, Keysha agreed to become a secret agent.
Or C as in cat
The answer to your question is True