Which best explains how the idea that "ignorance is bliss" fits into Kant's argument?

a. It is an ideal state that existed in the Garden of Eden.

b. All people should strive to attain a state of blissful ignorance.

c. It is one of barriers to Enlightenment.

d. It is a way of rejecting the logic of his predecessors

The statement which best explains how the idea that "ignorance is bliss" fits into Kant’s argument is: d. It is a way of rejecting the logic of his predecessors. This idiomatic phrase literary means 'the less I know the less I care about things', so according to its meaning it becomes clear that Kant would rather rely on his own experiments and investigation than just follow unsuccessful ideas of his predecessors.