The correct answer is A. Custodian.
A custodian is a person who is responsible for the care and maintenance of a building or other property. They are typically responsible for cleaning, repairs, and security. Custodians need to be vigilant and honest in order to ensure the safety and security of the building and its occupants.
A curator is a person who is responsible for the care and management of a collection of objects, such as a museum or art gallery. Curators need to be knowledgeable about the objects in their collection and be able to make decisions about their care and display.
A watchman is a person who is responsible for guarding a building or other property. Watchmen need to be alert and aware of their surroundings in order to prevent crime or vandalism.
A dean is a person who is in charge of a school or college. Deans need to be able to manage a large organization and make decisions that are in the best interests of their students and faculty.
In conclusion, the correct answer is A. Custodian. Custodians are responsible for the care and maintenance of a building or other property. They need to be vigilant and honest in order to ensure the safety and security of the building and its occupants.