In Which of the Following Ways Can Trace Evidence Be

In which of the following ways can trace evidence be used in criminal investigations?

A) It helps to determine how a victim and an offender reached a crime scene.
B) It helps to locate and identify hot spots and cool them down.
C) It is used to link evidence to a suspect that increases the likelihood of a conviction.
D) It is gathered from a victim's body during the autopsy and is used to indicate the time of death.