What is the verb and type in this sentence. the children were marching in single file.?

i think its:

c. a disadvantage of the proposal is that there will be fewer people under the monarchy.

well, number 1, the 1920s was not economically prosperous until the start of the lend-lease act, which employed large amounts of people in producing equipment for the allies.

b. world war ii is your answer, because wwi had already ended at 1918, and the cold war was after 1945.

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