C: demonstrate that Washington was an important figure in history
Answer: Wealthy people have more willpower than poor people
Explanation:
The implied main idea of this reading is that wealthy people have more willpower than poor people.
This can be deduced from the passage that while the children from poorer families were more likely to eat the first marshmallow than wait, due to the fact the future is uncertain, the wealthier children found it easier to hold out, because they believed that their needs will be met.
I'm not exactly sure what your asking but for animal diseases it would be a veterinarian
