Most serious violent crimes are considered a. felonies b. misdemeanors c. blue-collar crimes d. white-collar crimes? !

a. Felonies

Explanation:

Most serious violent crimes are considered felonies, that's the opposite of misdemeanors which are for crimes of lesser importance.  Both are related because they speak of the severity of the crimes.

The other two don't tell anything about the severity of the crime, but rather about who committed the crime.  Blue-collar crimes are the crimes committed by low-class workers, like plant workers, drivers and such.  White-collar crimes are the crimes committed by people with higher working class, like bosses or company executives.

the correct answer is c. the use of consistent patterns that keep the elements in a series in the same form.

  parallel structure, also known as parallelism, is the use of the words in a sentence with the same patterns to attain the same importance for each word. it should be used when connecting words, such as for, and, or etc. are present. one example is: paul likes playing soccer and to swim. (not parallel). paul likes playing soccer and swimming. (parallel)