Which was the main goal of the Open Door Policy? to ensure China maintained its independence
to protect US trade interests in China
to ensure imperialist countries could trade equally with China
to guarantee the United States exclusive trading rights with China

Option D - to guarantee the United States exclusive trading rights with China.

Explanation:

The main purpose of the open door policy was to make sure the United States would have access to China's markets.

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. 

the best description of postwar writers might be progressive.

following the war, writers showed a tendency to work on artistic or social matters rather than political themes. while postwar literature may not have been the greatest period of english literature, the themes provided excellent critics a high number of novels. such examples include anthony burgess, anthony powell and frank kermode, all of which can be placed under the progressive view.