Source: Free GMATPrep questions discussed.
1.
A recent poll indicates that many people in the United States hold a combination of conservative and liberal political views' i.e., they denounce big government, saying government is doing too much and has become too powerful, while at the same time supporting many specific government programs for health care, eduation, and the environment.
In the above example, shouldn't they denounce........while at the same time supporting have a parallel structure as they denounce.....while at the same time support ?
2.
Most of the purported health benefits of tea comes from antioxidants--compounds also found in beta carotene, vitamin E, and vitamin C that inhibit the formation of plaque along the body's blood vessels.
can this sentence be corrected as-
Most of the purported health benefits of tea come from antioxidants--compounds also found in beta carotene, vitamin E, and vitamin C that inhibit the formation of plaque along the body's blood vessels.
If yes, then does that indicates compounds or vitamin C or the preceding list of example?