Abnormal behavior as the name it indicates it is the behavior that is different from the normal behavior. This may be due to mental illness or due to any psychological disorder.
In some cases feelings like grief also makes a person behave abnormal due to some frustration. This sometimes leads to a conflict with the peers, family members and also violates some cultural issues. These should not regarded as a serious issue and take it as an abnormal behavior.
Hence the options b and c are not correct.
Sociological behavior as the name indicates it influences the sociology of a group. If focuses on the relationships of demographic and group variables like the age, race, gender, socioeconomic status and culture of the group. It concludes that a group of people from a disadvantaged background has chance of becoming as a perpetrators and victims
Hence the correct option is.