Final answer:
Three elements that contribute to campus safety measures include blue light poles/call boxes for emergencies, CU safe alerts to inform the community, and the presence of two police forces for enhanced security.
Step-by-step explanation:
The question at hand asks which three elements contribute to safety measures on a college campus. The options provided include blue light poles/call boxes, which are emergency phones for quick communication with law enforcement; CU safe alerts, a form of communication system that informs the campus community of safety threats; and the presence of Two Police forces, namely the City of Clemson Police and University Police, which enhances security through increased patrol and jurisdictional cooperation. Additionally, security cameras serve as a deterrent to crime and a means to record any potential incidents, thus contributing to the overall safety of the campus environment.