Which sentence has correct punctuation? a. my family recently switched to using low flow showerheads to conserve water. b. the gift was much-appreciated even though it arrived after his twenty first birthday. c. ninety-nine percent of the senior class wants to hold the prom on friday night. d. katya accidentally turned onto the one way street because the sign was missing.

not concrete, existing in thought or as an idea but not having a physical or concrete existence

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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i cannot see a paragraph to answer the question

sorry, idk never read it