Final answer:
An indicative act points towards behavior or circumstances relevant to a crime, such as an ongoing argument with family members, which could suggest a possible motive.
Step-by-step explanation:
An indicative act at a crime scene is an action or evidence that implies a certain behavior or circumstance related to the crime being investigated. Among the options provided:
- (a) The victim parking their car in the garage as usual.
- (b) The victim making a 12-minute phone call to their sister.
- (c) The victim recently celebrating a birthday.
- (d) The victim being in an ongoing argument with family members.
Option (d), the victim being in an ongoing argument with family members, can be noted as an example of an indicative act. This is because it could suggest a possible motive or interpersonal issue that might be relevant to the crime. In contrast, the other options do not directly indicate any unusual or suspicious activity that could be related to the crime.