For an electro-hydraulic cargo-handling pedestal-type deck crane, what event would result in an immediate stop to all crane motions, including slewing, hoisting, and luffing?

Correct Answer: Option B — All motions are stopped by the loss of electric power to the crane.

Electro-hydraulic cranes rely on electric power for control circuits, solenoid valves, and motor starters. A total loss of electrical power de-energizes these components, causing hydraulic control valves to return to a neutral or fail-safe position, which immediately halts all crane motions to prevent uncontrolled movement.