If the administrator wishes Linda to have broader constraints that include access to both Divisions X and Y, which constraint option should be chosen for existing permissions?

Selecting "Append Constraints" is the appropriate choice to grant Linda broader access to both Divisions X and Y without altering her existing permissions. This option allows the administrator to add additional constraints to her current access rights, enabling her to access both divisions while retaining any prior access she has.

When applying constraints, "Append Constraints" specifically means that the new permissions will be added to the existing ones rather than completely replacing them or restricting them. This ensures that the user does not lose any previous permissions they had, making it the best choice for expanding their access profile.

In contrast, options such as removing or replacing constraints would either eliminate existing permissions or entirely replace them with new ones, which would not achieve the aim of providing broader access across both divisions. Additionally, overriding constraints typically refers to setting permissions that negate existing ones instead of expanding them, which is not the goal in this scenario. Thus, "Append Constraints" effectively supports the need for broader access.