Which of the following factors contributes most positively to the development of secure attachment between human infants and their mothers?

A) egocentrism
B) responsive parenting
C) stranger anxiety
D) authoritarian discipline

Responsive parenting is the most important factor contributing to the development of secure attachment between human infants and their mothers. Responsive parenting involves sensitivity, warmth, and support, in which the caregiver attends to the infant's needs and responds appropriately to their vocalizations and behaviors. This consistent and nurturing behavior helps to build trust and a sense of security in the infant, which promotes healthy attachment relationships. Egocentrism, stranger anxiety, and authoritarian discipline are not directly related to the development of secure attachment.