Which of the following statements is true of apartheid practices in south africa before and after 1948?
a. apartheid practices were not common in south africa until they became official policy in 1948.

b. apartheid practices were not common before or after becoming official policy in 1948.

c. apartheid practices were common but not official policy until they became law in 1948.

d. apartheid practices were more brutal before 1948, but grew milder after 1948 due to government regulations.