A single-party state is one in which multiple political parties are allowed.
only one political party is allowed.
only one opposition party is allowed.
no political parties are allowed.

a

"the land of the dead"

no statements but ok.

the statement that best describes the idea of manifest destiny that was used in the 19th century would be that "it was fate that the united states would continue to  expand westward," since people thought the us was "destined" to do so.