Municipal governments are beginning to confront the growing pension liabilities; this leads local politicians throughout the country to become increasingly vocal about restraining costs and limiting services.
the growing pension liabilities; this leads
their growing pension liabilities; leading
the growth in their pension liabilities, which leads
their growing pension liabilities, leading
their growing pension liabilities, that leads
Basically this sentence is the case of Modifier and Meaning. I do not know how this is the case of parallelism. It is a modifier problem and not parallelism.
Option A: This leads is the wrong usage as the second clause is somewhere dependent on the first clause. the second clause does not have a subject. 'this' means what. Also the meaning of the sentence is a bit not clear but ambigiuous.
Option B: a ';' and leading is wrong usage. In a modifier , + ing form modifies the whole first clause or the first part. A ';' intends at beginning a totally new clause or a sentence.
Option C: wrong modifier and intending a wrong meaning. which only modifies the word 'liabilities' and not the whole first part. The whole thing 'Municipal governments are beginning to confront the growing pension liabilities' is resulting in something and not only the liabilities. That is the change of meaning in the sentence.
Option E: The same thing is happening in the sentence E. same as option C.
Option D is modifying the overall first clause. It is certainly getting rid of all the errors and also conveying the correct meaning unambiguously.
I dont know how is this a case of parallelism. This is the case of Modifier and Meaning.
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