What distinguishes de jure segregation from de facto segregation in the context of racial discrimination?

a. De jure segregation is characterized by legally enforced policies, while de facto segregation arises from societal patterns and practices.
b. De jure segregation is based on individual preferences, while de facto segregation is mandated by law.
c. De jure segregation is inherently unjust, while de facto segregation is considered acceptable by most citizens.
d. De jure segregation is based on societal patterns and practices, while de facto segregation is legally enforced.