This question is trying the quantitative concept of permutations and combinations with verbal list parallelism.
It will improve education, make government at all levels more cost-effective and user friendly, reduce health-care costs while improving quality, and give communities new ways to address problems such as crime and pollution.
A. It will improve education, make government at all levels more cost-effective and user friendly, reduce health-care costs while improving quality, ---
The only correct parallel list -- This is the correct choice.
B. It will improve education, make government at all levels more cost-effective and user friendly, health-care costs will be reduced while improving quality, --- '
health care costs will be reduced' spoils parallelism. C. It will improve education, make government at all levels more cost-effective and user friendly, reduce health-care costs while improve quality, ---
while improve quality -- wrong dictionD. It will improve education, make government at all levels more cost-effective and user friendly, reducing health-care costs while improving quality, ---
reducing is one of the lists. It is a modifier but acrually has to be treated on par with other items with a verb status. E. It will improve education, making government at all levels more cost-effective and user friendly, reducing health-care costs while improving quality ---
making cost effective and reducing health care costs are absurdly projected as results of improvement in education. -- Warped meaning