SAT Question e26d23c4: Words In Context answer and explanation

English - Words In Context - Fill In Blank Single Word
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Proposals to raise the age at which retirees begin receiving government transfers of funds are generally discussed in terms of the effects on transfer recipients, but Andria Smythe has argued that delaying such transfers could ______ wealth creation among working adults by lengthening the period in which they are providing financial support to their nonworking parents.
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Difficulty:Hard
Which choice completes the text with the most logical and precise word or phrase?