Final answer:
Both Ketchum Marsh and the author of 'I Believe in the Also-Rans' are frustrated by their limited athletic abilities and have families that emphasize the importance of athletics (option B). They may also have attended exclusive schools that focus on achievement.
Step-by-step explanation:
The frustration experienced by both Ketchum Marsh in 'A Baseball School for Big-League Dreamers' and the author of 'I Believe in the Also-Rans' stems from their limited athletic abilities.
While their situations can be accurately characterized as having families that emphasize the importance of athletics, another option is that they have attended exclusive schools that focus on achievement.