The correct answer is C) Bareboat. In a bareboat charter, the charterer is responsible for providing the crew and operating the vessel, while the owner retains ownership of the vessel. The requirement for the owners to approve the Master for the entire life of the charter contract is a characteristic of a bareboat charter, where the owner maintains a high level of control over the vessel's operation. The other options are incorrect because: - Voyage charters and time charters do not typically give the owner this level of control over the crew selection. - A lease arrangement is not the same as a bareboat charter, as a lease does not involve the charterer operating the vessel.