Which of the following correctly describe cell protection in spreadsheet software? Choose all that apply.

Cell protection can restrict changes to cells and, when the hide option is used, can conceal their contents, so A is correct. In typical spreadsheet software, cells are marked locked by default but that setting only takes effect after sheet protection is turned on; cell contents are not hidden by default, so C is correct. Unlocked cells can be modified, and protection is not guaranteed against every kind of access or change, making B and D incorrect.

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