When Considering Topics Such as Gratitude, Forgiveness, and the Development

When considering topics such as gratitude, forgiveness, and the development of hope and optimism,

A) findings consistently show that there is little to no biology involved in the development of these processes.
B) scientists have been unable to determine what effect biology might have on the study of positive psychology.
C) underlining neurobiological forces play a much greater role than earlier theorists had believed.
D) underlining neurobiological forces play a role in many of the concepts discussed in the textbook.