Answer:
D). Despite massive federal subsidies to public transportation systems and major local efforts to persuade.
Step-by-step explanation:
As per the question, option D most appropriately revises the underlined part of the sentence('In spite....persuade') as it is syntactically and semantically coherent. It precisely follows parallelism(plural form in 'federal subsidies..transportation systems and local efforts') that gives a clear and comprehensive meaning. The other options are incorrect as they either contain parallelism error(inappropriate use of 'subsidizing' in option A) or unnecessarily uses the verb form('at persuading' in option B and 'making' in option C). Thus, option D is the correct answer.