Statements A, C and D correctly explain the nature and advantages of OER, while statement B is false. OER are freely accessible resources with permissions for reuse and adaptation, they are often shared under licences like Creative Commons and they help reduce costs and expand access. They are not confined to printed textbooks and may include digital media of various kinds. Therefore, the combination containing A, C and D only is the correct answer.
Option A:
Option A is correct because it selects exactly the three true statements and excludes the incorrect restriction in B. It recognises the licensing flexibility and access benefits of OER beyond print formats. This option is fully consistent with ICT-enabled open education practices.
Option B:
Option B is incorrect because it chooses A and C only and omits D. Although A and C are true, D also accurately captures cost and access advantages of OER. Excluding D makes the set of statements incomplete.
Option C:
Option C is incorrect because it groups C and D only and leaves out A. While C and D are correct, statement A provides the core definition of OER regarding free availability and permissions. Without A, the explanation of OER is incomplete.
Option D:
Option D is incorrect because it treats all four statements as correct and thus accepts B. Statement B wrongly limits OER to printed textbooks when they actually include many digital formats, so this combination cannot be accepted.
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