According to Abraham Maslow, at the ________ level of motivation, a musician must make music, an artist must paint, and a poet must write, if he is to be at peace with himself.

A) respect
B) survival
C) belonging
D) fulfillment

Maslow's hierarchy of needs theory proposes that all human beings have certain needs that must be met in order to achieve self-actualization, or the state of being fully functioning and content with one's life. At the highest level, self-actualization needs, individuals seek to fulfill their potential and engage in activities that are meaningful and fulfilling for them personally. The examples given in the question - a musician making music, an artist painting, and a poet writing - are all activities that are typically associated with self-actualization, as they allow individuals to express themselves creatively and engage in activities that are personally fulfilling. Therefore, the best answer is D - fulfillment.