A survey respondent reports repeated assault by their spouse, as well as verbal abuse and threats. This has happened regularly about once a month over the course of the year, and the respondent couldn’t share specific details about any one event as they all run together. According to the National Crime Victimization Survey, this would be categorized as a ______.
a. Part I crime
b. crime multiplier
c. series victimization
d. Group A crime