Which best describes who is required to consent to a lawful eavesdrop according to the eavesdropping statute?

The eavesdropping statute in Illinois requires that all parties involved in a conversation must give their consent for it to be legally recorded or monitored. This protection is in place to uphold privacy rights and ensure that individuals are aware that their conversation is being captured. Therefore, any lawful eavesdrop must be conducted with the understanding and agreement of everyone involved in the communication.

In this scenario, the correct choice reflects the legal requirement for consent from all parties. This contrasts with the other options, which suggest scenarios where fewer parties are needed to consent or where additional authorities, such as a state's attorney or a chief judge, are involved. Such stipulations do not accurately represent the straightforward requirement of mutual consent from everyone participating in the conversation as stipulated in the statute.