रीसस बंदरों पर प्रयोग करके लगाव (Attachment) के व्यवहारवादी सिद्धांत को चुनौती देने वाले प्रसिद्ध अध्ययन किसके द्वारा किए गए थे?

Given below are two statements: Statement I: Kohlberg's theory of Moral Development proposes that in the 'Pre-conventional' level, moral reasoning is based primarily on external rewards and punishments. Statement II: In the 'Post-conventional' level, individuals move beyond social rules to follow universal ethical principles and their own conscience. In light of the above statements, choose the correct answer from the options given below:

According to Erikson's stages of psychosocial development, the crisis associated with early childhood (toddlerhood) is: