Which of the Following Statements About a Successful Person Best

Which of the following statements about a successful person best describes how contemporary psychology views the mind ?

A) Sam was just born smart, though no one else in his family seems to share his intelligence.
B) Sam, who never studies but gets good grades, must have gotten the "smart gene" from his mother.
C) Sam was sent to the best schools and thus became a highly intelligent individual.
D) Sam was alert and responsive as a baby, studied diligently in school, and was admitted to a top-ranked college.