Final answer:
The Fair Housing Act of 1968 prohibits steering and blockbusting in California.
Step-by-step explanation:
The California state law that prohibits steering and blockbusting is the Fair Housing Act of 1968.
Blockbusting is a controversial practice in which realtors convince white homeowners in a majority white neighborhood that the arrival of a black family has eroded the value of the houses. They would then buy the property from the white homeowner at below market value and sell it to a prospective black homeowner at above market value. This practice was outlawed by the Fair Housing Act of 1968.