Both Harlow and Bowlby's Work Help Us Better Understand Attachment

Both Harlow and Bowlby's work help us better understand attachment. Which accurately reflects their research?

A) The work of both emphasized an evolutionary view of attachment.
B) They both advanced a constructivist view of attachment.
C) They both examined the cultural components of attachment to understand how infants adapt to environmental demands.
D) Bowlby focused on the gradual formation of the attachment relationship whereas Harlow believed it was more immediate.
E) Harlow focused on human research implications whereas Bowlby focused on evidence from animal studies.