Both describe information that cannot be proved
The correct answer is C. In "The Things They Carried," the group of men have to find and destroy certain tunnels. One man must to go into the tunnel headfirst, a role that none of them want to do. To decide, they pull numbers, with 17 being the unlucky one. Lee Strunk pulls number 17 (equivalent to the shortest straw).
The word prodigy applies to Waverly due to her being especially good at chess, or whatever it was she does. Her mother's point of view on prodigy is being the best she can be, and the term applies to her mother by not being quite as smart as her daughter.
C. She sees Gretchen as a rival and a competitor.