单选题 Approximately 5,000 people who have been convicted of nonviolent crimes in the state have been given community-service sentences instead of prison sentences. These offenders perform services commensurate with their training and skills, from scrubbing floors to conducting research for the state. The community-service program, which began in 1979, has grown immensely as a result of drunken-driver legislation enacted a few months ago.
The introduction of the community-service program in 1979 was most probably prompted by which of the following, all of which occurred during the 1970's?