A. that are efficient, sustainable, and socially supported B. are efficient, sustainable, and socially supported C. they are are efficient, sustainable, and socially supported D. with effi
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Mark the letter A, B, C, or D on your answer sheet to indicate the correct option that best fits each of the numbered blanks from 18 to 23.
that are efficient, sustainable, and socially supported
are efficient, sustainable, and socially supported
they are are efficient, sustainable, and socially supported
with efficient, sustainable, and socially supported