The correct answer is B) French bowline. The French bowline is the preferred knot for sending a person over the side because it creates a secure loop that the person can use both hands to hold onto, allowing them to be safely lowered or raised. This is important when the person may need to use both hands, such as when they are carrying equipment or injured. The other answer choices are not as suitable for this purpose. The standard bowline (A) does not provide as secure a loop. The running bowline (C) is more prone to slipping. The bowline on a bight (D) is more complex to tie in an emergency situation.