The Idiom “All hands on deck” means

A. Hands having no proper strength
B. A call for everyone to take part in work
C. A cause of quarrel for all people
D. To feel sorry for what has happened

All hands on deck

A cry or signal is used on a vast perspective, typically in an emergency, to indicate that all crew members are to go on deck.
It is used to indicate that the involvement of all members of a team is required.