Which of the Following Best Describes the Process of Adaptation

Which of the following best describes the process of adaptation in evolutionary theory?

A) the development of structures and problem-solving mechanisms that allow the species to survive in a specific environment
B) the ability to attract a mate of equal or superior education and social class
C) the motivation to ensure the reproductive success of those who share one's genetic ancestry
D) the willingness to share resources with those who are unable to contribute on their own