According to the passage, dreams result from ( ).

(单选题)( ) (单选题)( ) (单选题)( ) (单选题)( ) (单选题)( ) (单选题)( ) (单选题)What does “such altruism” (in bold) in the last paragraph re (单选题)What can we infer from Dr. Cohn’s team’s study? ( ) (单选题)Which of the following sentences can best fit in the blank i (单选题)In which way was Alain Cohn and his colleagues’ study differ