What is the right of arrest for someone conspiring to commit a felony?

The correct choice, indicating "Felony arrest," is based on the understanding of the legal framework surrounding conspiracies and the circumstances under which law enforcement may make an arrest.

In cases of conspiracy to commit a felony, law enforcement officers typically have the authority to make an arrest without a warrant. This is because conspiracy itself is regarded as a serious offense, and police can act based on probable cause when they believe a conspiracy has been established and that the crime is a felony. The nature of the crime being a felony allows officers to make an arrest on this basis.

In contrast, the other options generally describe different circumstances or types of legal actions that do not directly apply to the immediate powers of arrest concerning felony conspiracy. For instance, while a complaint might initiate a court proceeding, it is not the primary mechanism for arresting someone for conspiracy. Additionally, the stipulation that a warrant is required does not hold in this situation, given that exigent circumstances often enable officers to intervene directly without prior authorization from a judge. This underscores the direct authority law enforcement has in responding to felonies, particularly those involving conspiratorial actions.