Invocation of the Miranda right to remain silent must be:

The correct answer recognizes that the invocation of the Miranda right to remain silent requires that the suspect's intention to invoke that right must be clearly articulated in such a way that it is both evident and unambiguous. An express and unambiguous invocation ensures that law enforcement understands that the individual is choosing to exercise their right to remain silent, thus terminating any ongoing police questioning.

While the surrounding circumstances can be important in determining context, they do not replace the necessity for an explicit statement from the suspect. When an individual invokes their right to remain silent clearly, the police are compelled to cease any further interrogation. Therefore, both the need for an unambiguous statement and the requirement for the police to stop questioning are critical aspects of this legal principle, which is why the first option focusing solely on surrounding circumstances would not suffice because it does not establish the necessary clarity needed in the invocation.

The combination of the explicit invocation of the right to silence and the subsequent requirement for police to halt questioning captures the essential legal framework surrounding the Miranda rights, thus making the comprehensive nature of the chosen answer valid and robust.