One path for achieving self-actualization was through the attainment of
a. gratification of the id
b. peak experiences
c. desired reinforcers
d. gratification of the superego

b. peak experiences

Explanation:

One of the most important concepts in organizational psychology is Maslow's hierarchy of needs. The highest level in the pyramid (visual representation of the hierarchy) belongs to the self-actualization needs, coming after physiological, safety, social belonging and self-esteem needs, in that specific order.

Given that self-actualization is the highest level of psychological development, it is associated with the attainment of peak experiences, which are unique for each individual, but always represent an excited mental state during the experiences, events, activities when the individual reaches full potential. It is synonymous with the flow state, a nearly euphoric stage when we engage with activities bringing us nearer to reaching our ultimate goals (ambitious business goals, innovating something, creating a piece of art...).