Please! help me with this

What is the main idea of this paragraph from the volcanoes section of the ready.gov website

Read the excerpt from frederick douglass’s speech “what to the slave is the fourth of july? ” go where you may, search where you will, roam through all the monarchies and despotisms of the old world, travel through south america, search out every abuse, and when you have found the last, lay your facts by the side of the everyday practices of this nation, and you will say with me, that, for revolting barbarity and shameless hypocrisy, america reigns without a rival. which phrase best describes the connotation of the word “reigns”? a sense of opportunity and growth a sense of fear and anxiety a sense of compassion and humanity a sense of oppression and domination

Use any method to combine the following sentences into one sentence. elvis presley died in 1977. his music is still popular today. graceland in memphis was his home.