The correct answer is B. There must be evidence that a crime has been committed.
Explanation:
Every time a crime is committed, and this is reported to the authorities, the authorities open an investigation to understand the crime and find those involved. This includes gathering evidence in the crime scene, finding witnesses, among others. The results of the investigation commonly lead to formal criminal charges and later the arrest of suspects, which is necessary to begin a trial process. However, it is against the law to arrest individuals if there is no evidence to prove they committed the crime; this is known as "probable cause" and protects individuals from being unjustly arrested. According to his, before, a law enforcement officer can arrest a suspect there must be evidence that a crime has been committed.
