What must the captain provide if maintenance is not included in the ticket?

In situations where maintenance is not included in the ticket for maritime travel, the captain is responsible for providing certain necessities to ensure the comfort and well-being of the passengers. Option A states that the captain must provide food, charging a reasonable price if necessary. This reflects the standard obligations under maritime law, where the captain has a duty to take care of passengers during the journey.

Providing food aligns with the common maritime practice of ensuring that passengers are fed and comfortable while onboard, especially if maintenance and other services are not included in the ticket price. Charging a reasonable amount for food ensures that the service can be sustainable for the captain and crew while still prioritizing passenger welfare.

The other options do not adequately address the responsibilities of the captain in relation to the needs of passengers when certain amenities are not included in the ticket. Thus, the obligation to provide food becomes the correct choice, highlighting the balance between passenger rights and the limitations set by what is included in their ticket purchase.