I need help, im single lol im a teen girl xD

Which piece of legislation signed by lyndon johnson brought an end to barriers preventing minorities from participating in elections?

How did the phillips brothers expand their businesses? by selling it to other businessmen by changing their source product by merging their companies by acquiring government support

The u.s. government has three branches: executive, judicial, and legislative. each branch plays a different role in making sure laws are passed, enforced, and applied fairly in accordance with the united states constitution. which idea does this scenario best represent?