To allow parents to see the new calendar, what must Mr. Jones do?

To enable parents to see the new calendar, the most effective approach is to make it public. When a calendar is set to public, it means that anyone with the link can view it, which includes the parents who need access. This option allows for broad visibility without restricting access and ensures that all intended viewers can easily find and access the calendar information.

Setting the calendar to private would prevent parents from seeing it at all, and making it shared typically requires sending specific invitations or granting permissions to individual users, which may not be as straightforward for a larger group of parents. The option of making it local suggests a limitation to accessing the calendar only on a specific device or network, which would further hinder accessibility for parents who may not have access to that local environment.