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.
The correct answer is B. The results of scientific studies should be interpreted cautiously.
Explanation
The text is about an experiment on children's willpower regarding whether or not to eat a marshmallow. It is possible to reflect on scientific studies because when they are carried out, all the factors that affect the result must be taken into account. For example, in this case, a factor that was not taken into account was the socioeconomic origin of the children (and it directly affects the result of the study) because poor children could eat the marshmallow because they considered their future to be uncertain, while rich kids knew that the future could get anything they wanted. According to the above, the correct answer is B. The results of scientific studies should be interpreted cautiously.
