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A developer is asked to improve a page's maintainability by reducing its code repetition.
Which technique should the developer implement to achieve this?
Template decorators provide a standard mechanism for extracting shared page structure---such as headers, navigation, wrappers, footers, and common layout markup---into reusable ISML templates. A child template uses<isdecorate>to select a decorator, and the decorator uses<isreplace/>to identify the location where the child's page-specific content is inserted.
Salesforce describes<isdecorate>as the ISML mechanism for decorating enclosed content with another template and defines<isreplace/>as the placeholder where the decorated content is inserted. A typical use case is wrapping different page bodies with a common header and footer.
This architecture directly reduces repeated layout code and improves maintainability because a shared element can be changed in the decorator rather than edited across many individual pages.
Option B misuses<isscript>; script tags are intended for executable template scripting, not reusable page composition. Option C doesn't represent the standard decorator-based technique requested by the question and can encourage fragmented template composition when a reusable layout is the underlying requirement.
Study Guide reference:Application Development --- ISML templates, template decorators,<isdecorate>,<isreplace>, reusable presentation structure, and maintainable storefront design.
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