TED video
1. B (not A; one of the poorest countries in the world, not the poorest)
2. A (not B; more than 150 other kids, not C; far away)
3. C
4. B (“clay cannot stand the rainy season”)
5. A (not B; the roof is made of concrete, not C; the walls are made of clay)
6. B (not C; only one prototype)
7. B (not C; they collect sand and gravel after the rains)
8. A