Robberies are considered to be either

a. violent or nonviolent.

b. professional or amateur.

c. planned or unplanned.

The answer in the item above is: B. Robberies are considered to be either professional or amateur. Professional robberies are well thought planned and has been consistently making money or earning a living as a robber. The amateur robberies are those who are not really earning it as a living and are not consistent in committing the crime. Usually, they would go for banks.