Read the following sentence. Then choose the answer that both gives the
 best definition for labile and correctly names the type of context clue you
 used to determine that definition.
 My friend's labile disposition caused me to be constantly on my guard; I never
 knew when his mood would suddenly turn from joy to despondency.
 O A. Depressed; example
 B. Touchy or sensitive; synonym
 O C. Likely to change easily; example
 O D. Angry; synonym