Which of the Following Is an Example of How Development

Which of the following is an example of how development is contextual?

A) Reasoning ability is biologically finite and cannot be improved through retraining.
B) Parents in the United States are more likely to rear their children to be independent than do parents in Japan.
C) Older adults call on experience to guide their decision making.
D) Intelligence may be studied by looking at genetics, anthropology, sociology, and other disciplines.