Final answer:
The provision that invalidated the 'separate but equal doctrine' of Plessy v Ferguson is Title II: Public Accommodations.
Step-by-step explanation:
The provision of the Civil Rights Act of 1964 that invalidated the 'separate but equal doctrine' of Plessy v Ferguson is Title II: Public Accommodations. This provision made it illegal to discriminate against individuals on the basis of race, color, religion, or national origin in places of public accommodation, such as restaurants, hotels, and theaters.
Learn more about Civil Rights Act of 1964