What best describes the facts leading to an objective belief of an offence?

The correct choice is best characterized by the legal standard known as "probable cause." Probable cause refers to the reasonable grounds for believing that a crime has been, is being, or will be committed. This is essential in law enforcement as it provides the basis for making arrests, obtaining search warrants, and conducting investigations.

In practice, probable cause is determined by assessing the totality of circumstances surrounding a situation. This includes the objective facts and circumstances that would cause a reasonable person to believe that an offense has occurred. Such beliefs are grounded in factual evidence rather than mere suspicions.

In contrast, the other options, while related to the context of offenses, do not define the objective belief required to take legal action. Indictable offences refer to serious crimes that can lead to more severe legal consequences but do not inherently illustrate the grounds for an objective belief. The submission of evidence is a procedural element that follows the establishment of probable cause but is not itself a descriptor of the belief process. Eyewitness accounts are valuable pieces of evidence, yet they may be subjective and can vary in reliability, thus not forming the foundational basis of probable cause on their own.